Sounds workable to me LKK! An exciting discovery
The next time I get ahold of the London Times perhaps I can help you prove it.
Here's a bio I will add on Mrs William Endicott.
ENDICOTT, ELLICE (nee Ellice Mack)
United Kingdom/United States
Born 05 February 1892 in St Johns Ward, Hampstead, London, England
Died 25 April 1973 in Wenham, Massachuesetts.
Married William A Endicott (died 25 August 1941) on 27 March, 1919 in London.
She was a somewhat shadowy figure in England-snippets refer to her as an actress or English beauty. As yet we have no evidence she was a player of note in England.
That changed when she met and wed William Endicott, a Harvard Graduate who was working for the US Red Cross in London. Endicott had children by his first marriage-this second union was childless. The newly married pair returned to the Boston area in 1919, and throughout the 1920s one finds Mrs William Endicott in draws up and down the east coast of the US.
The NYT calls her “a famous English girl and a baseline player of unusual ability” (NYT 19 March 1924). She often partnered Bety Corbiere in doubles-the pair won the US Women’s Indoors in 1925 and were active on the Riviera in early 1928. Both were members of the Longwood Country Club.
She was good enough to be ranked #10 in the US in 1916 and #11 in 1927.
After her tennis days were over Ellice was a painter and sculpter of some note.
Photo on page 87 of the 1930 Wright and Ditson annual.