X The Encyclopedia of Celtic Mythology and Folklore
parchment made from plant fibers. Unless such
materials are carefully preserved, they can
quickly deteriorate. In addition, the vagaries of
history—including several centuries of Viking
raids—meant that some great works were lost to
fire, water, and other destruction. What we have
today often survived by an accident of history. It
is impossible to know if other surviving texts
may someday be unearthed and might change
our view of the Celtic past.
Nonetheless a number of significant manu-
scripts have survived for more than a thousand
years. The most famous, the Book of Kells,
records no mythic material but is completely
devoted to Christian scripture. More useful for
the scholar of mythology are the Book of the Dun
Cow, written down in the 11th century (allegedly
on the hide of a cow whose milk-giving powers
recall a mythological image of abundance); the
Book of Leinster, written in the late 12th century;
the Book of Úi Maine, written in 1394 by Faelán
mac Gabhann; the Book of Ballymote, transcribed
ca. 1400 C.E.; and the Yellow Book of Lecan, com-
posed by three scribes in 1417. Each of these
compilations includes a number of stories and
poems, some of which are called “books” (as in
the Book of Invasions); because this can be confus-
ing to the nonspecialist, we will use the term book
to refer to any compilation and the term text to
refer to a single story.
One of the oldest of the texts is the Book of
Invasions (also called the Book of the Taking of Ire-
land), which was written down in the 12th cen-
tury in several versions. This text describes the
history of Ireland from the beginning of time.
While there are obvious biblical interpolations
(Noah, for instance, appears as an ancestral fig-
ure), there are also many mythical figures promi-
nent in the works; thus the Book of Invasions is a
major source for information about Irish, and
through it Celtic, mythology.
Another text written down at about the same
time, but based on much older material, is the
Dindshenchas or place-poetry. Each poem tells
the history of a place-name, and as many such
names derive from their connection to myth, the
poems of the Dindshenchas provide valuable
mythic information. In addition, a series of Irish
texts variously categorized as adventures, visions,
wooings, cattle raids, elopements, and voyages
provide vivid images of Celtic life. Some of the
most important are the Irish epic called the Táin
bó Cuailnge; the legal texts called the Senchas
Mór; the short poems called the Triads; the col-
lection of Welsh myths, the Mabinogion; and the
poems of the great and presumedly historical
Welsh bard Taliesin.
Unfortunately, less than one-quarter of the
known texts have been translated into English.
Many of those are difficult for the average reader
to obtain. In addition, even when translated, the
texts often present problems in interpretation.
The valuable medieval texts that make up the
Dindshenchas, for instance, are filled with allusions
to stories and figures who are now unknown.
Because all of these texts were created after
Christianization, it is impossible to tell whether
the stories were altered to fit the new worldview
or whether they truly reflect the viewpoint of the
Celts. In general, where a story conveys a mean-
ing different from the later (in this case Christ-
ian) worldview, it can be assumed to be correctly
transcribed, while anything that agrees is suspect.
If, for instance, a monk describes a world-
destroying event as a flood, it would be impossi-
ble to tell whether that was originally a Celtic
idea or whether it was imported from biblical
sources. Conversely, if the same monk described
a god who wheeled a huge mallet around on a
cart—a figure not found in the Bible—we can
assume that the image was originally Celtic.
In addition to the 500 or so tales and poems
that survive from ancient Ireland, some texts are
known from other insular Celtic societies. After
Ireland, the greatest wealth of mythological
material was transcribed in Wales: the White
Book of Rhydderech, composed in the early 14th
century, and the Red Book of Hergst, composed
some fifty years later. Together, the tales com-
piled in the two books comprise the Mabinogion,
a great cycle of myths as complex and rich as any
known to the literate world.