Thomas, A.G. Esmeralda, 188-? t.p. (Theo. Marzials) [info. from InU]
Slonimsky, N. A very great musician, c1989 caption (T. Marziale)
Biographical dictionary of musicians, 1940 (Brussels Dec. 21, 1850-Feb. 1920. Pupil of M. L Lawson, London; studied later in Paris and Milan; 1870, supt. mus.-dept. British Museum; barytone and composer of pop. songs.)