The Rook is a time-traveler whose adventures were chronicled in various issues of Eerie magazine published by Warren Publishing in the 1970’s. The character was created by writer Bill DuBay. The Rook eventually proved popular enough to receive his own Rook Magazine which ran for 14 issues between 1979 and 1982 (after its cancellation; he returned to Eerie in #132).
The Rook is actually Restin Dane, from a family of scientists whose members include the unnamed protagonist of the classic science fiction novel The Time Machine by H.G. Wells. Dane got his nickname from the fact that his time machine resembled a giant chess rook. Dane wears Western style clothing and a gun belt. His first adventure was to travel back in time to the Alamo to save his great-great-grandfather Bishop Dane, who then accompanies him on many of his adventures, along with two robots that he built.
In a later adventure, he meets the Time Traveler (who is revealed to be his grandfather Adam Dane) from Wells' book, and helps him in a war between the Eloi and the Morlocks.