The Morton Jewell Troupe “American Novelty Club Jugglers, presenting “An Event in Clubdom”” appeared at Sunderland Empire on 8 December 1913:
There are a couple of references on the web that note that the Morton Jewell troupe were the only act who combined singing with juggling. The Just Juggling Jottings article from the Vaudeville Missouri Breeze of 1 October 1915 is a real gem.