The above appeared in the June 1975 issue of Stereo Review (formerly Hi-Fi Stereo Review), now archived here. The letters are in reference to a Bangs twin review, from March ’75 (one I’ve never seen before) of Harrison’s Dark Horse and Ringo’s Goodnight Vienna (a “metal-flake glow-in-the-dark music box”).
More links to HFSR stuff ahead.
RockCritics.com 
At that point the magazine was just called Stereo Review. I was Lester’s editor there, BTW.😀
Thanks, Steve. Came across a piece by yourself, in fact, about rock critics and/or rock criticism. (I’ve bookmarked but not yet read it, and will likely link to it here.)
Edited Lester–I imagine there are a few stories there.
Watch out Lester. Take it, Lou.