Title: Merlin's magic
Description: a family treasure hunt which is found to be guided by Merlin and the god Mercury.  Involves adventure andtravel to different places including the planet Mercury 

originally published by reindeer books in 1953 and republished by hamilton in 1963
illustrations y cecil leslie
Subjects: children, adventure, sf
Places: planet mercury
Time periods: about the time it was written ie 1953