An Illustrated History of the Swampies

An Illustrated History of the Swampies was a book the Fourth Doctor found on Delta III. He and Romana then browsed it for information about Kroll.

It recounted the tale of how the Swampies had been brought to Delta III from Delta Magna and how Kroll had swallowed the symbol of his power during his third manifestation.

The Doctor described the book as "a sort of Bayeux Tapestry with footnotes." When he had finished with the book, he dropped it into a hole. (DW: The Power of Kroll)