of Coal Pit lane, Easton, Bristol
1830 Colliery founded by William Boult, Robert Leonard and a former Jamaican plantation owner named William Betts (1770-1847) to run a coalmine in Easton. 
1833 Leonard, Betts and Boult listed as proprietors of the Lower Easton Colliery.
1836 Merged with Davidson and Walters to form Leonard Boult and Co.
Sources of Information
- ↑ 'Mason, C., 2014, Archaeological Excavation and Watching Brief, Siston Hill Farm, Siston Common, South Gloucestershire, unpublished Bristol and Region Archaeological Services Report 2979/2014,
- ↑ Mathews' Directory, 1833