This image previously appeared in Terry Bennett's "History of Photography in China: Chinese Photographers 1844-1879", published by Bernard Quaritch in 2013, with the caption:
Fig. 6.25. Lai Fong (Afong Studio). ‘No. 627. – The one
on the left is a civil Mandarin of high rank named Chan
Ting Chee, while that on the right is Pang Yook the late
Commander of Kowloon, a military’, 1870s. Author’s
See http://gwulo.com/node/31857 for more information.
It is reproduced here with the permission of the author and publisher.