The following came in by email. If anyone can help please post here or reply to Pat by email. They might be willing to use a sound file of a similar engine if neccessary, but I don't know.
Hello. I emailed you a month or two ago about a sound recording of a 1908 Model L Palmer engine. We (the Oxford Museum) have one on display and we would like to have the recorded sound of the engine as part of the exhibit. Pete Lesher, curator at the Chesapeake Bay Maritime Museum said you would be the person to contact.
Please let me know if you have (or don't) or can suggest where else I might try.