context: In 1896, he helped establish the Collectors Club of New York, and was later its president for a number of years.
source: Luff had become perhaps the most prolific philatelic writer of the age, with works ranging from the tutorial What Philately Teaches Us (1899) to the classic reference work The Postage Stamps of the United States (1902), and numerous articles in the AJP and Mekeel's Weekly Stamp News.
reference_original: Luff havia se tornado talvez o escritor filatélico mais prolífico da época, com trabalhos variando do tutorial What Philately Teaches Us (1889) até seu trabalho de referência clássico The Postage Stamps of the United States (1902), além de numerosos artigos no AJP e Mekeel's Weekly Stamp News.
reference_flipped: Luff havia se tornado talvez a escritora filatélica mais prolífica da época, com trabalhos variando do tutorial What Philately Teaches Us (1889) até seu trabalho de referência clássico The Postage Stamps of the United States (1902), além de numerosos artigos no AJP e Mekeel's Weekly Stamp News.