There is still some hope noytd. Please let us know what you find out.
I'm keeping my fingers crossed. 
I have been trawling through the British Newspaper Library, and discovered that Howbury was still being rented out during the Edwardian era, when Cecil Polhill returned to China.
1907-1908 - Commander Philip Charles Knightley Wolfe Murray (1856-1932)
1909-1913 - Major Geoffrey Carr Glyn (1864-1933)
A look into both men produced disappointing results. Neither, at first glance, would appear to match the photographs by associated geographical locations or ages and marriages.
I have also located photographs of Robert Peck's sons, but they do not appear to match any of the males in my album. The Peck's were clean shaven, whilst the men in the photo album are moustached.
However, I am hopeful on the car registrations. Fingers crossed the first registered owners will link into the album
