A member of my club (Lancaster Muzzle loading Rifle Association) presented his master's thesis from 1969 to us at one of our meetings. He graduated from Franklin and Marshall which is in Lancaster and his thesis was entitled, "Henry Eicholtz Leman and His Production of the Pennsylvania Rifle." This thesis was also printed in the Journal of the Lancaster Historical Society. I asked Sam if I could share it here and he was more than happy for me to do that. I will get it scanned and then upload it under a new thread entitled same.
To you older collectors, Sam is the nephew of Vince Nolt who used to have an antique gun museum in Strasburg, PA with an extensive collection of longrifles. Sam told me today that he has sold off all his rifles which comprised great pieces such as Beck, Dreppard, Brandt, Gumpf, etc but the one rifle he kept is...you guessed it, A Leman.