You are welcome. Found it by accident.
The Bukowski-Martinelli-Correspondence (Beerspit Night And Cursing) may have weak points, but at least one main subject in B's letters seems to be Jory Sherman and his (somtetimes mixed) feelings toward him.
For example: "Sherman, I have once or twice started to give up on but just when I am ready he comes up with a letter, entonic, blazing from the shouls. If he could just get across some of himself into the poem without trying to be so god damned fancy like the rest of them. They all sit down and the first thing happens, big sign in mind: I AM GOING TO WRITE A POEM. A POEM." (p.58)
Or: "Sherman on phone again, wanting to come over. I am his dad, when he in trouble, come see Buk, drink beer, spill his piss before me. A formula. I told him no. I am in some trouble. He told me stuff and stuff, sharp, glib. American voice, humorous, cold energetic, undefeatable, false, money-mad, woman-mad voice ... unable to sit stille for a moment and watch the centuries come down in wonderful dust, the names, the ages of man, monkey-man and man-man all comin gown to wistful stone; no, no, he wants assurance and talk talk talk and beer beer beer, not alone, but with somebody, weak this Sherman; I have told him to take the stars and the seas out of his poems and bring in real blood, and over the phone I told him no. God damn, I am no wet-nurse for 2nd. rate poets. If Jeffers wants to drop in for abeer, I'll reconsider." (p. 244)