Hope no one minds me tapping into the collected wisdom like this.

The slow movement of A.S. Arensky's op.35 string quartet is a set of variations on a Tchaikovsky theme. This was subsequently arranged, as op.35a, for string orchestra. I've seen this arrangement listed as by both Arensky and Glazunov. My question is: was this arrangement by Arensky himself, or Glazunov, or are there two arrangements, one by each?

Muchly ta.

Thanks Tommo - further investigation suggests that the Glazunov is an arrangement for full orchestra (rather than just strings), so presumably a separate work from the better-known Arensky arrangement.