Only started this yesterday, but have now got through it - successfully I believe. Testing at times, but very enjoyable.
It doesn't effect my completed grid but, on a matter of principle, could someone please explain the second part of 41 Ac :- "such as one seen in rounded mount". I have got a bit hung up on the word "Inselberg" (defined in Chambers as "a steep-sided round-topped mount" but cannot see any connection to the poetic answer I have which I am sure is correct.