Thanks a lot. I spent most of the weekend on it, after a gestation period that began during an April 2007 Architectural Walking Tour! It kept snowballing. I would appreciate your help submitting it to WP:DYK. I suppose the two most interesting factoids I turned up were things I found via other Wikipedia entries: (1) the connection of the T.R. Foster Building to Foster Botanical Garden and Inter-Island Steam Navigation Company, which explains why the 1891 Foster Building (O'Toole's), but not the better-known, corner-entrance 1890 Royal Saloon Building (Murphy's), was mentioned on the NRHP nomination form; and (2) the unexpected explanation for the alternate name of the old Honolulu Police Station, the Walter Murray Gibson Building. One connection I failed to find in Wikipedia (or elsewhere yet) was that between Matson Navigation Company and Inter-Island Steam Navigation Company, both founded in 1882.