Lynn [ Massachusetts ]: Heal, Josiah W. [ 1879 ]. First Edition. Not paginated. Oblong. 12 x 9 inches. 49 leaves affixed to binding structure with linen hinges. New leather spine and corners over original cloth boards gilt. Front pastedown is additional advertising, rear pastedown is blank. About half the leaves have significant dampstaining (the lightest at the foreedges and only marginal, the worst extending about 1/3 into the text or photograph portion of the page) Image quality varies, the worst being the photograph of Lydia Pinkham's building which is badly spotted. One leaf is printed on a different paper stock, in partial color and with slightly smaller page dimensions. Good. Boards. 
There are at least two works with this title. 1) [ as here ] with 24 albumen illustrations and many additional pages of business advertisements. 2) A photograph album with 23 glazed collotype images with rounded corners, captions, and surrounded by decorative borders but with no advertisements. Both contain images by photographer C.E. Cook. Interestingly some content appears to be different.
The present example contains forty nine leaves (98 pages) plus an additional page of advertising affixed to the front pastedown. Of these, 24 pages are albumen photographs with captions (but no decorative borders and square corners). There are 4 pages of information about Lynn and it's statistics/goverance. The balance (aside from the photographs) are advertisements for local firms - some full page, some as small as a business card. Some advertisements are two color, with a few pages full color productions.
OCLC/Worldcat notes eight examples with  pages,  pages of plates (or 95 pages total). This example, with 99 pages total, would be the "most complete" version at least according to Worldcat descriptions. One page is an avertisement with a photograph of a building owned by the publisher Josiah W. Heal, noting that he is heading west, and desires to sell the building at a good price, not something a publisher would likely waste money on printing for very long. A substantial and impressive undertaking for such a localized area.
Scarce in the marketplace. Charles Wood 2003 catalog for 3,500 noting "These ‘booster books’ were never common; this is the first one I have seen on the market in at least a decade." In addition to his example, Swann's in 2014 for 4,750 (noting 34 images). Both were in better condition than the example offered here.