DEAR MR. CALVER,—Since writing to you I have been observing with the
6-1/2 in. equatorial telescope, and I have much pleasure in
informing you that I am greatly pleased with its performance. The
definition of the planets is beautiful.
I am happy to inform you that I have found a most minute crater in
Picard _a_, it is much smaller than the test crater (mentioned in
Cel. Obj., by WEBB, page 83) in same formation. I wrote to Mr. WEBB
about it, and since then I have seen it distinctly; it is another
proof of the excellence of your telescope.
Yours truly,
(_Signed_.)
Mr. G. CALVER.
* * * * *
_From_ J. C. HARKER, Esq.