April 1. George H. Baker began work.

Bats in shed loft, Concord.
April 27 one in outer shed - the first
[April 27] to May 5 - One daily
May 6 - Two (in outer shed.)
[May] 7 Five [in outer shed] 
[May] 8 Eight (4 in outer 4 inner loft)
[May] 9 Eleven 10 [in] inner 1 outer loft
[May] 10 [Eleven 10 in inner 1 in outer loft]
[May] 11 Twelve 11 [in inner] 1 [in outer loft]
[May] 13 Fifteen all [in inner] loft
[May] 14 [Fifteen] 9 [in inner] 6 [in outer loft]
[May] 15 [Fifteen] 5 [in inner] 10 
[May] 16 Sixteen 6 [in inner] 10 [in outer loft]
[May] 17 [Sixteen] all [in outer loft]
[May] 18 [Sixteen all in outer loft]
[May] 19 [Sixteen all in outer loft]
[May] 20 [Sixteen all in outer loft]
[May] 21 [Sixteen all in outer loft]
[May] 22 [Sixteen all in outer loft]
[May] 23 [Sixteen all in outer loft]
[May] 24 [Sixteen all in outer loft]