John Frederick Gill was born in Sciliy and very probably the son of Joseph Gill, another son of Joseph was W H Gill the musicologist (and author/composer of Manx national anthem) - no John Agnew is noted at home in the 1881 census (his uncle Wm + I think father went to King William's college but not sure if John agnew Gill did) - if he was away at public school then these schools normally track later history of their pupils (I don't have immediate access to KWC records at the moment)