[Updated 20/12/25]
The building is a similar build to House 14, which is early 20th century, sometime before 1924.
It is situated on the east side of Fa Peng down the hill from 14, and for that reason it cannot be seen in any photos of Fa Peng taken from the west.
Very like House 14,the walls are rendered granite and all its windows are metal framed.
The roof is flat reinforced concrete. Like House 14, it's in a ruined state.
According to the HKMaps 1962 ground plan, there was an annex for domestic staff behind the main building, which was plain-fronted and south-facing towards the sea. At some point later on, a verandah was added. Today it would appear the property has been demolished or abandoned.
On the back of the 1923 picture of this house, Ethel Olson wrote, 'The bungalow belonging to the old missionary who has lived here for five years and planted all the trees and plants around the house. He sort of superintends the island."
In the 1938 list of European owners of houses on Cheung Chau, the owner of House 13 is given as Mr A H Mackenzie, which looks to be this Allen Mackenzie, an island resident rather than a missionary and described as 'Cheung Chau's bachelor.'
Don Ady's account has him as a 'cranky mean old miser,' who was not popular, living alone in his stone house, but in the same paragraph says that in 1939 he got some new boarders, a missionary family named Thompson, whom he treated meanly.
Rose Reiton's diaries (1930-34) give quite a different picture of him. Here he is regarded as a friend of the Reiton family, stopping over with them in Kowloon, present at family birthdays and other occasions, and giving generous and thoughtful presents at those birthdays.
Perhaps in the late 1930s he had a change of character? He died in 1941 at the beginning of the war.