Factual error: So the Civil War ends, and the colonel heads for Texas. It must have taken close to a decade to arrive there, for when he rides into Blackthorne, Texas, he's packing a Model 1873 Colt, and a Model 1873 Winchester.
Factual error: The lock on Secker's front door, seen in the shot when he returns home from Highgate Cemetery, is a modern (stainless steel) Yale lock and barrel, not a High Victorian dead lock; his front gate is made of paper-thin iron from the 1960's; the lamp post Screen Left is supposedly gas-powered but has an electric feed running over the pavement.