Here are a couple Corbett's from 1892 which I'm confident are real. The letter that has been posted is undoubtedly signed by Corbett but the heading and content are secreterial and in another hand. Instead of a small case "t" he used a capital "T" in "Truly" as is the case with the two posted here. The person who penned the content of the letter is more apt to have signed your Corbett rather than Corbett doing it himself. The "C" in the last name of the person the letter was addressed to is similar to the "C" in your "Corbett". Also the backwards 3 style "e" in "Rochester" is similar to the "e" in yor "Dec". I can't find the backwards 3 style "e" in any of Corbett's writings. I watched the offered Corbett end cheaply on Artfact and would have wacked it pretty good if it had the supporting evidence.
