Ann Wilson, another favourite redhead of mine and one that is also mistaken in some shots for the other redhead, Dawn Grayson. This may be due to the fact that both posed outdoors for GHM with his White Buick and both have similar body shapes.
Ann started posing for Harrison Marks in 1964 and the above shot comes from Solo No.44 (1965) dedicated to her. Ann was one of the few models to be shot by GHM in the house and grounds at a manor in Orpington, which we now know was Walden Manor. So it seems that the shots of Ann, Dawn and others with the White Buick may well have taken place at Walden and Not Ewhurst.
A great shot of Ann above and now I have many more to share thanks to getting a great copy of Solo No.44.