5"x4"
6"x5"
81/2 "x 61/2"
10"x8"
12"x10"
13"x11"
15"x12"
18"x16"
22"x20"
25"x21"
.
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Lens Book, Volume 3. 1877-1881
Brent Archive 198028/3/3
Serial numbers 26000-31000