Charles Cameron comments in email to Marvin Sackner: dsh must have shown him some concrete poems, but Trungpa was extremely interested in the arts, was a friend of poets such as Allan Ginsberg and Anne Waldman, published a book of poems (First Thought, Best Thought) -- and there's also a volume of poems published collectively (Timely Rain). He pretty much situated himself in the Beat Poetry environment in the early 70s, and I suspect dsh had a lot to do with that. And there's a calligraphic signature by Trungpa [in the lower right corner]. -- Source of annotation: Marvin or Ruth Sackner.