Interesting to see these references - many thanks. Sherer was spelled in a variety of ways - Scherer (German) as well as Cherer (French); his sister Maria used a variety of spellings, as did his other sisters, who had been famous in Russia as the Bekefi sisters. Fedor Bekefi was dancing with his (then) wife, Sofia Rossova (sometimes Sherer, sometimes Bekefi) following their arrival in the US from Russia in 1919 until the mid 1920s. Then the trail seems to go cold until he reappears as a dance teacher in New Jersey in the late 1930s, by which time he seems to have married another of his partners, Grace Robinson. Sorry, I have no information on Ethel Mevay, and have not come across her name before. It would be interesting to hear whether they were indeed partners in the 1930s.