Despite the full-time work in the shipyards, as a teenager Bell would spend his spare time studying in the Belfast Museum. It was during this time that he developed an interest in geology, and began to collect specimens of minerals and fossils at the weekends. Bell discovered the skull of the fossil Ichthyosaurus communis in 1885, in lias clay in the mountains outside of Belfast. When he married Margaret Millar in 1896, he began to spend time at her parents' home in Randalstown, County Antrim.[1] In 1912, he was made a lifelong member of Mineralogical Society of London.[3][6] Over time Bell was recognised as an authority on local geology, aiding visiting scientists, led many field trips, and prepared and catalogued specimens. In particular his skill with a geology hammer was noted,[1] being referred to as "Knight of the Hammer".[7] He assisted Dr W.F. Hume of the Egyptian Geological Survey, and George William Lamplugh of the Geological Survey of Ireland.[4]
Bell was a member of the Belfast Naturalists' Field Club from 1893. He would display his specimens at the club's annual social evening, winning the award for best exhibit numerous times. Bell was awarded an Honorary Membership by the club in 1925, receiving the club's Commemoration Medal in 1926 for his scientific contributions. He also discovered a Neolithic flint factory on Black Mountain, above Belfast in 1922. A portion of Bell's collection of zeolite minerals is now in the Ulster Museum, which includes many first records for Ireland. The Ashcroft Collection of Irish zeolite collection in the Natural History Museum, London is also based around Bell's specimens. However, Bell sold the majority of his specimens to dealers, collectors, universities and museums.[5][6] Two minerals which Bell collected were new to science and were named by Cecil Edgar Tilley scawtite and larnite in honour of County Antrim, where they were discovered. Bell was also an Honorary Member of the Belfast Natural History and Philosophical Society,[2] and also had an interest in botany.[8]
