diff --git a/gedcom/element/element.py b/gedcom/element/element.py
index 3428e3c..ada376f 100644
--- a/gedcom/element/element.py
+++ b/gedcom/element/element.py
@@ -63,6 +63,16 @@ class Element(object):
     """
 
     def __init__(self, level, pointer, tag, value, crlf="\n", multi_line=True):
+        """Creates a new GEDCOM element.
+        :type level: int
+        :type pointer: str
+        :type tag: str
+        :type value: str
+        :param crlf: line ending appended when serialising the element
+        :type crlf: str
+        :param multi_line: when True, long values are split across CONC/CONT continuation lines
+        :type multi_line: bool
+        """
         # basic element info
         self.__level = level
         self.__pointer = pointer
@@ -131,7 +141,8 @@ def __available_characters(self):
         return 0 if element_characters > 255 else 255 - element_characters
 
     def __line_length(self, line):
-        """@TODO Write docs.
+        """Returns the number of characters from `line` that fit within the available space of a GEDCOM line (max 255 chars).
+        Trims trailing spaces to avoid splitting a word across lines.
         :type line: str
         :rtype: int
         """
@@ -147,7 +158,8 @@ def __line_length(self, line):
         return available_characters - spaces
 
     def __set_bounded_value(self, value):
-        """@TODO Write docs.
+        """Sets this element's value to as many characters of `value` as fit within GEDCOM line limits.
+        Returns the number of characters consumed.
         :type value: str
         :rtype: int
         """
@@ -156,7 +168,8 @@ def __set_bounded_value(self, value):
         return line_length
 
     def __add_bounded_child(self, tag, value):
-        """@TODO Write docs.
+        """Adds a child element with the given `tag` and as many characters of `value` as fit within GEDCOM line limits.
+        Returns the number of characters consumed.
         :type tag: str
         :type value: str
         :rtype: int
@@ -165,8 +178,8 @@ def __add_bounded_child(self, tag, value):
         return child.__set_bounded_value(value)
 
     def __add_concatenation(self, string):
-        """@TODO Write docs.
-        :rtype: str
+        """Splits `string` into GEDCOM CONC child elements, each fitting within line length limits.
+        :type string: str
         """
         index = 0
         size = len(string)
diff --git a/gedcom/element/family.py b/gedcom/element/family.py
index c91b5a9..f5bd899 100644
--- a/gedcom/element/family.py
+++ b/gedcom/element/family.py
@@ -32,10 +32,15 @@
 
 
 class NotAnActualFamilyError(Exception):
+    """Raised when an operation requires a FamilyElement but a different element type is provided."""
     pass
 
 
 class FamilyElement(Element):
+    """Represents a GEDCOM family (FAM) record."""
 
     def get_tag(self):
+        """Returns the GEDCOM tag for this element.
+        :rtype: str
+        """
         return gedcom.tags.GEDCOM_TAG_FAMILY
diff --git a/gedcom/element/file.py b/gedcom/element/file.py
index d02e8eb..d932efc 100644
--- a/gedcom/element/file.py
+++ b/gedcom/element/file.py
@@ -32,10 +32,15 @@
 
 
 class NotAnActualFileError(Exception):
+    """Raised when an operation requires a FileElement but a different element type is provided."""
     pass
 
 
 class FileElement(Element):
+    """Represents a GEDCOM file (FILE) record."""
 
     def get_tag(self):
+        """Returns the GEDCOM tag for this element.
+        :rtype: str
+        """
         return gedcom.tags.GEDCOM_TAG_FILE
diff --git a/gedcom/element/individual.py b/gedcom/element/individual.py
index da61d08..18cbe90 100644
--- a/gedcom/element/individual.py
+++ b/gedcom/element/individual.py
@@ -34,12 +34,17 @@
 
 
 class NotAnActualIndividualError(Exception):
+    """Raised when an operation requires an IndividualElement but a different element type is provided."""
     pass
 
 
 class IndividualElement(Element):
+    """Represents a GEDCOM individual (INDI) record."""
 
     def get_tag(self):
+        """Returns the GEDCOM tag for this element.
+        :rtype: str
+        """
         return gedcom.tags.GEDCOM_TAG_INDIVIDUAL
 
     def is_deceased(self):
@@ -119,6 +124,9 @@ def get_name(self):
         return given_name, surname
 
     def get_all_names(self):
+        """Returns a list of all name values for this individual.
+        :rtype: list of str
+        """
         return [a.get_value() for a in self.get_child_elements() if a.get_tag() == gedcom.tags.GEDCOM_TAG_NAME]
 
     def surname_match(self, surname_to_match):
@@ -182,7 +190,7 @@ def get_birth_data(self):
         return date, place, sources
 
     def get_birth_year(self):
-        """Returns the birth year of a person in integer format
+        """Returns the birth year of a person as an integer, or -1 if no birth date is set or the year cannot be parsed.
         :rtype: int
         """
         date = ""
@@ -222,7 +230,7 @@ def get_death_data(self):
         return date, place, sources
 
     def get_death_year(self):
-        """Returns the death year of a person in integer format
+        """Returns the death year of a person as an integer, or -1 if no death date is set or the year cannot be parsed.
         :rtype: int
         """
         date = ""
@@ -247,7 +255,7 @@ def get_burial(self):
         ::deprecated:: As of version 1.0.0 use `get_burial_data()` method instead
         :rtype: tuple
         """
-        self.get_burial_data()
+        return self.get_burial_data()
 
     def get_burial_data(self):
         """Returns the burial data of a person formatted as a tuple: (`str` date, `str´ place, `list` sources)
@@ -278,7 +286,7 @@ def get_census(self):
         ::deprecated:: As of version 1.0.0 use `get_census_data()` method instead
         :rtype: list of tuple
         """
-        self.get_census_data()
+        return self.get_census_data()
 
     def get_census_data(self):
         """Returns a list of censuses of an individual formatted as tuples: (`str` date, `str´ place, `list` sources)
diff --git a/gedcom/element/object.py b/gedcom/element/object.py
index 0090e2f..0fcc117 100644
--- a/gedcom/element/object.py
+++ b/gedcom/element/object.py
@@ -32,10 +32,12 @@
 
 
 class NotAnActualObjectError(Exception):
+    """Raised when an operation requires an ObjectElement but a different element type is provided."""
     pass
 
 
 class ObjectElement(Element):
+    """Represents a GEDCOM multimedia object (OBJE) record."""
 
     def is_object(self):
         """Checks if this element is an actual object
diff --git a/gedcom/parser.py b/gedcom/parser.py
index 74f40c7..aa44d64 100644
--- a/gedcom/parser.py
+++ b/gedcom/parser.py
@@ -48,7 +48,7 @@
 
 
 class GedcomFormatViolationError(Exception):
-    pass
+    """Raised when a GEDCOM format violation is encountered during parsing."""
 
 
 class Parser(object):
@@ -280,7 +280,7 @@ def __build_list(self, element, element_list):
     def get_marriages(self, individual):
         """Returns a list of marriages of an individual formatted as a tuple (`str` date, `str` place)
         :type individual: IndividualElement
-        :rtype: tuple
+        :rtype: list of tuple
         """
         marriages = []
         if not isinstance(individual, IndividualElement):
@@ -448,10 +448,13 @@ def get_parents(self, individual, parent_type="ALL"):
         return parents
 
     def find_path_to_ancestor(self, descendant, ancestor, path=None):
-        """Return path from descendant to ancestor
-        :rtype: object
+        """Return the path of IndividualElements from descendant to ancestor, or None if no path exists.
+
+        :type descendant: IndividualElement
+        :type ancestor: IndividualElement
+        :rtype: list of IndividualElement or None
         """
-        if not isinstance(descendant, IndividualElement) and isinstance(ancestor, IndividualElement):
+        if not isinstance(descendant, IndividualElement) or not isinstance(ancestor, IndividualElement):
             raise NotAnActualIndividualError(
                 "Operation only valid for elements with %s tag." % gedcom.tags.GEDCOM_TAG_INDIVIDUAL
             )
diff --git a/tests/element/test_individual.py b/tests/element/test_individual.py
index f5dfabd..94bceb2 100644
--- a/tests/element/test_individual.py
+++ b/tests/element/test_individual.py
@@ -19,3 +19,55 @@ def test_get_all_names():
 
     all_names = element.get_all_names()
     assert len(all_names) == 2
+
+
+def test_deprecated_get_burial_returns_data():
+    """Regression test: get_burial() is missing a return statement and returns None instead of the burial tuple."""
+    element = IndividualElement(level=0, pointer="@I1@", tag="INDI", value="")
+    burial = element.new_child_element(tag=gedcom.tags.GEDCOM_TAG_BURIAL, value="")
+    burial.new_child_element(tag=gedcom.tags.GEDCOM_TAG_DATE, value="1 JAN 2000")
+    burial.new_child_element(tag=gedcom.tags.GEDCOM_TAG_PLACE, value="Szczecinek")
+
+    result = element.get_burial()
+
+    assert result is not None, "get_burial() returned None — missing return statement bug"
+    assert result == ("1 JAN 2000", "Szczecinek", [])
+
+
+def test_deprecated_get_census_returns_data():
+    """Regression test: get_census() is missing a return statement and returns None instead of the census list."""
+    element = IndividualElement(level=0, pointer="@I1@", tag="INDI", value="")
+    census = element.new_child_element(tag=gedcom.tags.GEDCOM_TAG_CENSUS, value="")
+    census.new_child_element(tag=gedcom.tags.GEDCOM_TAG_DATE, value="1 JAN 1950")
+    census.new_child_element(tag=gedcom.tags.GEDCOM_TAG_PLACE, value="Szczebrzeszyn")
+
+    result = element.get_census()
+
+    assert result is not None, "get_census() returned None — missing return statement bug"
+    assert len(result) == 1
+    assert result[0] == ("1 JAN 1950", "Szczebrzeszyn", [])
+
+
+def test_get_burial_data_returns_data():
+    element = IndividualElement(level=0, pointer="@I1@", tag="INDI", value="")
+    burial = element.new_child_element(tag=gedcom.tags.GEDCOM_TAG_BURIAL, value="")
+    burial.new_child_element(tag=gedcom.tags.GEDCOM_TAG_DATE, value="1 JAN 2000")
+    burial.new_child_element(tag=gedcom.tags.GEDCOM_TAG_PLACE, value="Szczecinek")
+
+    result = element.get_burial_data()
+
+    assert result is not None
+    assert result == ("1 JAN 2000", "Szczecinek", [])
+
+
+def test_get_census_data_returns_data():
+    element = IndividualElement(level=0, pointer="@I1@", tag="INDI", value="")
+    census = element.new_child_element(tag=gedcom.tags.GEDCOM_TAG_CENSUS, value="")
+    census.new_child_element(tag=gedcom.tags.GEDCOM_TAG_DATE, value="1 JAN 1950")
+    census.new_child_element(tag=gedcom.tags.GEDCOM_TAG_PLACE, value="Szczebrzeszyn")
+
+    result = element.get_census_data()
+
+    assert result is not None
+    assert len(result) == 1
+    assert result[0] == ("1 JAN 1950", "Szczebrzeszyn", [])
diff --git a/tests/test_parser.py b/tests/test_parser.py
index 86df008..3d8be22 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -1,4 +1,6 @@
-from gedcom.element.individual import IndividualElement
+import pytest
+from gedcom.element.element import Element
+from gedcom.element.individual import IndividualElement, NotAnActualIndividualError
 from gedcom.element.root import RootElement
 from gedcom.parser import Parser
 
@@ -101,3 +103,31 @@ def test_parse_from_string():
 def test___parse_line():
     # @TODO Add appropriate testing cases
     pass
+
+
+def test_find_path_to_ancestor_raises_for_invalid_ancestor():
+    """Regression test for the 'and' vs 'or' bug in find_path_to_ancestor.
+
+    The guard condition uses 'and' instead of 'or', so passing a valid
+    descendant with an invalid ancestor silently skips the check and crashes
+    later with an AttributeError instead of NotAnActualIndividualError.
+    """
+    parser = Parser()
+    individual = IndividualElement(0, '@I1@', 'INDI', '', '\n')
+    non_individual = Element(0, '', 'NOTE', 'some note', '\n')
+
+    # valid descendant, invalid ancestor — the bug lets this slip through
+    with pytest.raises(NotAnActualIndividualError):
+        parser.find_path_to_ancestor(individual, non_individual)
+
+
+def test_find_path_to_ancestor_raises_for_both_invalid():
+    """Both arguments invalid — the buggy 'and' condition evaluates to False
+    and skips the guard entirely, crashing later instead of raising properly.
+    """
+    parser = Parser()
+    non_individual_1 = Element(0, '', 'NOTE', 'some note', '\n')
+    non_individual_2 = Element(0, '', 'SOUR', 'some source', '\n')
+
+    with pytest.raises(NotAnActualIndividualError):
+        parser.find_path_to_ancestor(non_individual_1, non_individual_2)