any concert where she has performed?
She made her American debut as a contralto concert singer on the evening of September 22, 1906 at the Norfolk Gymnasium in Norfolk, Connecticut, assisted by violinist Marie Nichols
Clara Clemens
 She made her American debut as a contralto concert singer on the evening of September 22, 1906 at the Norfolk Gymnasium in Norfolk, Connecticut, assisted by violinist Marie Nichols. 
who is clara clemens? Daughter of Samuel Clemens, who wrote as Mark Twain was she a writer like her father? She was a contralto concert singer and she managed his estate
wiki:8965746
Clara Clemens [SEP] Early career
She rented "Edgewood" there in 1905, and she used the proceeds from the concert to purchase a memorial window for her mother in the Norfolk Church of the Transfiguration. Charles Edmund Wark (1876-1954) was a classical pianist from Cobourg, Ontario, and he became Clemens' piano accompanist from the winter of 1906 to late in 1908. Clemens and Nichols also continued to perform together, including a series of concerts in London and Paris in 1908. On May 30, Clemens debuted in London at a benefit concert, raising money for American girls to attend Oxford and Cambridge Universities.