We recently digitized a number of images from Lambshead Ranch which is owned by Watt Mathews. Mathews was the guy who gave Avedon the cowboy hat he wore while out photographing his In the American West series.

There are 7 photographs of Avedon at Lambshead including a couple with Laura Wilson (she may have been the photographer of some) and a very fun photo postcard of Avedon and Laura Wilson they sent to Matthews.

Link