![lock of hair again](http://1.bp.blogspot.com/-kWtyxmksvm8/TlX4hte39aI/AAAAAAAABVA/4aYNpuAHw3o/s400/lock%2Bof%2Bhair%2Bagain.jpg)
Here is a lock of Eileen Mayo's hair and a rather good
post about it on the Tate archive. (It is in fact exactly the same colour as in the Harold Knight painting.) And
here is a letter (for sale at Maggs Rare Books) from Duncan Grant to Eileen Mayo – she was one of his favourite models as well, although nowadays we associate him with interiors and still lives rather than paintings of people.