Architecture card; style, showing place, etc.
The cards for the three divisions, architecture, painting, and sculpture, should be kept in separate alphabets.
Arrange the photographs of sculpture and painting alphabetically by authors where known; where not known, by subjects under the various sizes.
Arrange the photographs of architecture alphabetically by cities, under the sizes.
Indicate the arrangement on cards by two numbers, in blue ink: the Classification number and the Author number.
Classification number. This is indicated by the letters F, Q, O, D.
Author number. Use the C: A. Cutter Letter alphabetic-order table for book authors, and add to the number so gained the first one or two letters (as the number of prints may require) of the title of the print; or the numerals 1, 2, and 3 may be used.
Write these two numbers in blue ink on the cards, as follows: