December 16th, 1870.

Sir,—

As I gather from your continued silence that you are still uncertain about the Fridays, Jan. 13th and 20th, allow me to say that J will place at your disposal the two following Fridays also, so that you can choose which you prefer. Personally, I do not object to the New Hall of Science for the discussion, but I will consult one or two of my friends as to whether neutral ground would be best. The first thing is to fix the dates, and I am willing to take one tract each evening to prevent unnecessary trouble to you in bringing your books.

P.S.—I hoped you would send me your tracts for the two stamps, as you dated from 17, Johnson's Court I would have returned the postage.