It seems that Pilwocket has a cousin called Kern who is a scientist studying anomolies in the Earths gravitational field. He's just been to Antarctica where he weighed 309.82 grams at the Amundsen-Scott Research Station while he only weighed 307.8 grams in Sydney Australia. http://www.abc.net.au/news/2012-03-23/travelling-gnome-answers-weighty-question/3909162
Kern was on Newsround on CBBC this morning: http://www.bbc.co.uk/newsround/18546754 Matt & I both wondered if he had been mentioned on here & obviously Kern has been working his was from the Southern Hemisphere up to the Northern half of the world ... slowly!