Dear Dr Liew, I have a book entitled "Hakkas in Penang for 200 years", but it is written in Chinese. I am sure there is a version in English if you go and inquire from: Hakka Association, 72-A, Love Lane, 10200 Penang, Malaysia tel: 604-2631603 / 604-2288964 fax: 604-2289226 Yoon-Ngan