Grossmith took to the professional stage in 1870 with a sketch called "Human Oddities", written by his father, and a song called "The Gay Photographer" (that is, the "carefree" photographer). The song, with words by Grossmith's father and music by young Grossmith, concerns a photographer who broke the heart of a young lady named Miss Jenkins; so she drank his chemicals and died. In late 1870, the younger Grossmith appeared on his own with a nightly spot at the "old Polytechnic" in Regent Street, where comic sketches alternated with scientific and serious lectures for the entertainment of the public. "Human Oddities" and another sketch, "The Yellow Dwarf", were successful for Grossmith, and he took the former work on tour for six months. An 1871 Grossmith sketch was called "He was a Careful Man". Biographer Tony Joseph notes that, except for a few early pieces, nearly all of Grossmith's material was written and composed by Grossmith himself. Joseph describes the sketches as "a light-hearted sending up of various aspects of contemporary life and manners. ...he was the complete performer... as a pianist (he performed for the most part sitting at a piano)... as a raconteur... as a mimic, facial expression, timing—he had it all. A short, dapper figure, he turned his lack of inches to positive advantage, and audiences took to him everywhere."