15. Walk 1 km S.1 km E, then 1 km N to return back here.(5,4) 20. Heading towards a Grizzly?(7). 21. Word the located Roman archaeology on an OS map. (5).22. ... and a similar word noting non-Roman archaeology.(6).24. Standard hydrogen yet unites to show rainfall(7). 25. 3D complete Earth map(5). many thanks in advance.