The Towers, Broadwood Road [1916-????]
The location and date are rough guesses, based on the photos from Sean, and this entry he found in the Carl T Smith records:
July 15, 1933. SCMP: "The Towers" on a ridge above Broadwood Road at Happy Valley, built by the late Mr. C. E. Warren, and after his death occupied by his family for some years. Sold at auction to Messrs. Kwong Ning and Tam Man-Shiu, $45,000. Crown Lease May 22, 1916.
It is incorrect when it says the Warren family lived there after Charles Warren died. It was sold about 1924.
Any further information about this building welcome.