There is, indeed, no stop till in the seventeenth century we come to the tiny Elzevirs, which remained the last word in book-production until the diamond editions of Didot and Pickering.
"Fine Books"
Alfred W. Pollard
110 Pickering, Sir Gilbert, vi.
"History of the English People, Index"
John Richard Green
The discovery of new variables is of frequent occurrence, and may be expected to become more frequent when the sky is systematically explored for them by the ingenious device suggested by Pickering and illustrated in Fig.
"A Text-Book of Astronomy"
George C. Comstock