This firearm, as were many in this auction, were supported by spurious documentation:
Bonhams : SMITH & WESSON SCHOFIELD REVOLVER ATTRIBUTED TO JESSE JAMES. Serial no. 2921, circa 1875, .38 caliber 7 inch barrel with fluted sighting channel German silver sight.
All a notarized letter is is a signature verified by a notary that the person signing the letter on that day in front of the notary is indeed the person signing that letter on that day, having presented documentation proving their identity before the notary.
A notarized document does ZERO towards proving the veracity of the claim!!!
For me to actually believe the attribution of this firearm, I'm going to want solid proof, such as contemporary documentation in a published document or records of the era, stating this revolver by serial number. Smith & Wesson records stated in a letter would be acceptable as well, if this revolver specifically shipped to Jesse James or a close associate. A document signed by an individual in front of a notary decades after the fact is totally useless!
For example, there's
nothing preventing me from taking my Triple Lock revolver and writing a letter and documenting the serial number stating that I acquired this from individual "X" who inherited it from his father, who knew Buffalo Bill Cody and who was personally given this gun to him by Buffalo Bill, out of his personal collection. It means nothing. Except maybe to my heirs, who are clever enough to present this revolver for sale at Bonham's and a fool is stupid enough to accept my notarized letter as fact.
There's a sucker born every day!
Also, auction houses have no reason to prove the facts. Doing so makes one a party pooper and decreases the hammer price and bragging rights. It's much better to get free advertising and sell a firearm at the highest recorded price ever, even if the supporting documentation is shaky, at best. Plus, your commission is far greater as well.