As well as these field trips, "Mr. Lam has worked hard to gather together relevant books, such as Anecdotes from Macao, Records of Macao, and Ancient and Modern Macao, for use alongside the textbooks from China for contrast and reference," says one of Lam's colleagues and fellow Pooi To alumnus, Tam Hiu Wai.
探查之外，「林老師還致力於整理典籍，像是《澳門掌故》、《澳門紀略》、《澳門古今》等書，然後用這些書與內地教科書互相參照、引證，」跟著林發欽跑遍澳門的培道中學畢業生譚曉蔚說。