The only Cannell killed in mine was
CANNELL, Robert, of Baldhoon, aged 41, a married man with a family of eight, most of them young. A waggoner.
(see http://www.ee.surrey.ac.uk/Contrib/manx/famhist/genealgy/disaster.htm#sm)
He is in census at:
Lonan 9 Balldooin Road KERMODE Thomas Head M M 60 Lead Miner --- IoM
Lonan 9 Balldooin Road KERMODE Mary Wife - F 60 --- --- IoM
Lonan 9 Balldooin Road KERMODE Mary Ann Daur U F 21 --- --- IoM
Lonan 9 Balldooin Road CANNELL Robert Head M M 25 Lead Miner --- IoM
Lonan 9 Balldooin Road CANNELL Elizabeth Wife - F 23 --- --- IoM
Lonan 9 Balldooin Road CANNELL William Son - M 2 --- --- IoM
Lonan 9 Balldooin Road CANNELL Robert Son - M 1 --- --- IoM
There may be no relationship between the Kermodes and the Cannells other than as lodgers/sharing house

the only Fletcher Cannell I can find in 1881 census is:
Michael Kiondroughad CANNELL Patrick Head M M 53 Farmer (60 acres) Michael IoM
Michael Kiondroughad CANNELL Ann Wife M F 42 --- Patrick IoM
Michael Kiondroughad CANNELL Alfred K. Son U M 17 Farmers Son Michael IoM
Michael Kiondroughad CANNELL John Wm. Son - M 11 Scholar Michael IoM
Michael Kiondroughad CANNELL Robert Ed. Son - M 10 Scholar Michael IoM
Michael Kiondroughad CANNELL John Wilfd. Son - M 6 Scholar Michael IoM
Michael Kiondroughad CANNELL Fletcher E. Son - M 4 --- Michael IoM
Michael Kiondroughad CANNAN Anna Daur M F 21 Farmer's Wife Michael IoM
Michael Kiondroughad CANNELL Eleanor M. Daur U F 19 Farmer's Daur Michael IoM
Michael Kiondroughad CANNELL Louisa J. ((Margaret) Daur - F 8 Scholar Michael IoM
Michael Kiondroughad CANNAN Eliz. Ann G Daur - F 1 --- Michael IoM