This marine study shows two men in sculls on the River Thames with Windsor Castle in the distance. It was taken by English amateur Ralph Rowland Rawkins 1874-1951. The following details for the print were supplied on a paper label for the club included within the portfolio:

Title: Windsor Castle
Date, and Time:  Aug. 1904
Camera, and Lens: Pony Premo  5 x 4
Plate or FIlm: Kodak film
Exposure: 1/100th sec.
Process: Platinum C.C.  matted by pressure
Photographed by: R.R. Rawkins

A separate notebook included with The Hand Camera Postal Club, identified as Portfolio No. 7, with 20 mounted photographs from a roster of 11 members taken in the year 1904 gives the following two written comments for Windsor Castle by R.R. Rawkins, the Honorary Secretary for the club:

This is a little gem. The mounting is in such excellent taste.  –Jeannie Welford

A nice little print.  –F.W.H. (F.W. Hawksworth)

spotting to print: see accompanying blog post link on this page for photographic enlargement.