A seven-inch stiletto hung handle down in a sheath under her right arm, a .44 caliber Webley Bulldog was in a shoulder holster under the left.
He was nursing a snifter of brandy and he lifted it off the table. He gave the Bulldog a nod and a sardonic smile. "You do know Garfield was killed with one of those things?"
She looked down at the Webley and arched an eyebrow at him. "An effective round then, wouldn't you say?"
So a little background on this particular weapon... The lady is a Pinkerton detective, and she needs a handgun that's concealable, will fit her hand, and has what they call "knock down power," so -- good choice -- she carries a .44 Bulldog. It was British, manufactured in Birmingham, and one of the early double-actions. (A revolver that cocks itself and fires with every pull of the trigger.)
Postscript: Guiteau's Webley did end up in a museum. Briefly. After he was hanged in 1882, it was placed in the Smithsonian Institution. It disappeared shortly thereafter.