Interpreting Sheet Numbers
Considering that there were more
than fifty thousand editions of fire insurance maps of more than
ten thousand communities, it is not surprising to find inconsistencies
in the way sheets in a given edition were numbered. In early atlases,
numbering was often sequential across coverage for the whole city.
In other cases, especially in later editions, numbering was sequential
within each volume. In some early editions also, double-page plates
were given a single number, but the most common pattern was to
have a separate number for each page. Prefatory material was not
given page numbers, however.
In the checklist of maps, Fire Insurance Maps
in the Library of Congress, the figure in the column that
indicates the number of pages does not reflect the page numbering.
The figure that is given includes any unpaginated prefatory material,
even the inside of atlas covers to which indexes have been pasted.
Where applicable, the comments column in Fire Insurance Maps
in the Library of Congress indicates special numbering sequences,
such as double-page plates.
How to interpret: