I finally saw a great, crisp SHG stamping, Schulyer, Harley & Graham. This was on an 1862 dated Enfield, in front of teh butt plate tang. There was the crown, then a line under it, then the SH below, then the G below the S and the numeral "2" under the "H", with the letters and number arranged in a block form, as previously described. There was a line, and mentioned, and a downstroke like connected to it which divided the S from H and G from 2, so that the two lines were like the capital "T"
That's crisp!
JEff