Found these 2 1/2" by 4 1/2" negatives in an old math book. From the letter and inscription in the book, I think these are Marg and F.C. Van Wormer.
venus_in_stripes, antea, neurodiaz, jean_louis_pujol, zharenkov, werriston, wil6ka, lupo, mariaratfingers, jennson, charly, elede, mcrstar, picturegirl333, artichekt, blormore, nicolas_noir, lamp & susielomovitz.
these are great!