Think you could be right. Ell is a length, and again Itself, gives ELL ELL, divided by IS and B (for breadth). Altogether Heights: I described = the author Ellis Bell.
A bit of a messy clue, but it is probably correct.
Totterdown, I knew that it fitted but could only work out the heights bit of the clue. Thank you for the explanation, it makes sense now that I see it written down. Thanks again vegasmad.