As promised -
this is how the 31, B. Morskaya looked back in the 1900s. At the right, you can see a large glazed balcony just above the Yacht Club entrance. This balcony was used by the club members as a strategic observation post over the street and called
The Sopka - a clear allusion to the hills of Manchuria.
And
this is the book's cover. Details:
Bol'shaya Morskaya, by L. Broitman & E. Krasnova, from the series
Petersburg na ladoni [=~ in full view], Petersburg, Papirus Publ., 1997, 221 pp., ISBN 5-87472-161-4.