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This series consists of copies of two documents. The first is a holograph draft and typescript of paper by Alan J. Campbell, B.C.L.S., entitled "Photo-topographical control for vertical aerial photographs as used by British Columbia topographical surveys." The second is a copy of letter, 1932, from Campbell to the Surveyor General concerning photo-topographical surveys on Vancouver island [published in Sessional Papers, 1932, vol. 2, pp. 26-27].