During the 1890s Waddell specialised in Buddhist antiquities and became a collector, between 1895–97 he published "Reports on collections of Indo-Scythian Buddhist Sculptures from the Swat Valley", in 1893 he also read a paper to the International Congress of Orientalists: "On some newly found Indo-Grecian Buddhistic Sculptures from the Swat Valley". In 1895 Waddell published his book "Buddhism of Tibet or Lamaism", which was one of the first works published in the west on Buddhism. As a collector, Waddell had come across many Tibetan manuscripts and maps, but was disappointed to not find a single reference to a lost ancient civilization, which he had hoped to discover.