Blackwell mentions having tea in Victoria, BC, with Beatrice Whitehouse, who had attended BR's lectures in 1899 on Leibniz.

Whitehouse appears in Journey with No Maps: A Life of P.K. Page by Sandra Djwa (2012). She was Page's aunt and died on 2 May 1976. She is said there to have earned a Cambridge degree in 1896 (but not awarded it because of her sex), and had studied under Russell and Whitehead. According to the Newnham registry (see attached), she entered Newnham in 1896 and completed the degree requirements in 1899. Afterwards she trained as a nurse. She is mentioned at http://1914-1918.invisionzone.com/forums/index.php?showtopic=109633&page=1 as nursing at Endell Street Military Hospital during WWI.