I saw Van Ronk a couple times, but both were before my interest in Guild, so I failed to appreciate what he was doing all that fine fingerpicking on.
Digression: I grew up in northern Jersey, and spent time in all those Jersey places. One of my favorites (in Hackensack!) was the Weyman Brothers Bookstore. The pair were both still living when I shopped there and regular patrons will recall (with fondness) the sounds ot the two siblings bickering over something or another as you wandered the dusty aisles of bookcases.
They weren't exactly a used bookstore but might as well have been, as their stock was decades old. I found rarities every time I went there and became enough of a regular they let me sift through the stock on the second floor, which was normally off-limits. I spent hours up there. The upstairs had been a nursery in the '20 or '30s and the walls were covered in paintings of Humpty Dumpty, Mother Goose, Jack & Jill, the Cow Jumping Over the Moon, etc., done in that old Buster Brown-style artwork.
I can still go through my bookshelves today and point to the books I got at Weyman. Broke my heart when the brothers died and they tore that building down (to quote Rev. Gary Davis).