Topical or thematic stamp collecting is a tremendous way to diversify and expand one’s special interest. For me of course, this takes me to minerals, fossils, geology. etc. and the thousands of worldwide stamps carrying such images. But another collector in the Rochester Philatelic Association (RPA) with an interest in trains and the use of the railroad in postal history took his topical collecting in a different direction. The following is a review of his presentation to the Rochester Club in January.