found: Simple truths used by great singers.
found: Oxford Univ. info. 6 Jan. 1997 from wk. cat.: Trunbull, M. Mary Garden, 1997: p. 1 (Mary Garden; b. Aberdeen, Scotland; 20 Feb. 1874; the first of 4 daughters of Robert Davidson Garden and Mary Joss; she arrived a month after her parents married - a fact which might help to explain Mary's later revision of her birth-year to 1877)
found: Who was who, 1961-1970: (Mary Garden; b. 1874; d. 1967)
found: New Grove dictionary of music and musicians, 1990: v. 7, p. 161 (Mary Garden; opera singer; b. 1874)