Misc: what's the term for the giant forest hog's social unit?

Questions

Which fantasy novel published in 1937 has an alterantive title There and Back again?

Which Derbyshire town has a twisted spire?

which map drawn about 1290 and showing Jerusalem at the centre of a falt world is kept at Hereford Cathedral?

Which artist featured a cemetary in his home town in his 1923-27 painting The Resurrection:Cookham?

The presence of which organic substance is revealed by Benedicts test?