I still have the "folios" - 2 handbound books of poems - inside my LP of "Moondog 2" (Columbia). He used to sell them on 6th Ave & 54th St, in front of the old ABC building (sometimes 55th St - the MGM building - and sometimes 52nd St - the CBS building - these places had ledges in front where he could sit. Strangely, he never sat on the west side of 6th Ave - the Burlington building, etc.). He sold them out of a big leather sack he kept by his feet. It wasn't like he aggressively hawked them; he just sat there and would chat with anyone. I was a teenaged kid who worked as a messenger a few blocks away during summers, so was able to get out of the office a lot. He was a really nice guy; certainly had a lot of patience with me! And he looked and dressed exactly like the cover of Moondog 2 - the leather cape, the spear - but I don't think he wore the leather cap (the one with the horns) often in the hot summer.
What else do I remember? He always had a cigar butt clamped between his teeth, and would periodically discharge his spit into one of those metal tubes cigars used to come in. As you know, he was blind, so this was an easy way to be neat; he'd lift the tube to his lips.
We used to talk philosophy. I remember once he said to me, "the more laws men pass, the more criminals there are."