Exactly. My point was we should not be surprised that Friedlander would have done this himself or that it was out of the ordinary somehow. I have actually seen prints mounted this way and I think they look very elegant, with semi-glossy surface of the FB silver gelatin contrasting with the rich texture of slightly warm cotton papers.
I guess the other advantage of dry mounting a fiber-based print is that it will lay perfectly flat, although flattening them in a dry mount press and then using a window mat gets you pretty much there too.
