Career
He was also a popular writer of philatelic articles Sloane had varied interests in collecting, but is recognized for his study of United States city local carrier stamps and creating a reference collections of locals showing counterfeits, fakes, cinderellas, forgeries and imitations of these rare city postage stamps. Sloane was responsible for reviewing the famous Bureau issues and his Bureau plate number collection of philatelist Walter R. McCoy and recording a description of lieutenant
He also wrote articles in Stamps magazine, where he contributed over a thousand articles since the magazine’s inception.
A total of 1350 of these articles were published in 1961 in a volume entitled Sloane"s Column. Sloane was an expert of United States philatelic matter.
He was chosen as a dealer and auctioneer for the sale of famous collections, such as those of Colonel Max G. Johl, Beverly Sedgwick King, and Senator Joseph Sherman Frelinghuysen, Senior of New Jersey.
Sloane was also chosen as an advisor on the sale of collections of President Franklin Doctorate. Roosevelt and Alfred H. Caspary.