Another name for John was John Halle.
He worked as a Mariner in 1841 and resided at Platton Beauregard, St Peter Port, Guernsey. (transcribed as "Halle")
He worked as a Sailmaker in 1851 and resided at 3 Banks, St Peter Port, Guernsey.
John married Mary, daughter of Unknown and Unknown. (Mary was born Cal 1812 in Guernsey.)