2/22/57
Dear Joshua and Esther:
While at the Caltech meetings I heard that Calif (at Id.) was getting heterogenetics[?] from Hp[?] (Hayes) x E crosses.  Do you have any info on this?  Again people think this may be a characteristic of all Kn[?] crosses.  I don't have a copy of Hayes Hp[?] (W2324?) and would appreciate one if you can send it.  It should have the M-Lp+ marker if possible.  The other day I sent A. Campbell W3079 (r'd as M- Lac, -Gal y LpsR[?]) I don't know whether you want to keep a record of that or not.
Sincerely,
Larry