Image scanned from the Batsford Colour Book of Hampshire and the Isle of Wight by John Norwood, published 1975. The image is by A.F Kersting.
In the left background is Quebec House, built by public subscription in 1754 as a bathing house, with the harbour beyond.
This shows Treadgolds in Bishop St, Portsea, comparing the view from May 2023 and an old photograph from the early 1900s.
https://oddments.bygone.co.uk/then-and-now/Treadgolds/TGNew1.jpg