Hi Mark

Records show that Elener and John were full siblings.

Robert and Jemima married Aug 31, 1872 Lonan:

Robert Clague Full Age Bachelor Mason U/R Balla-gregga F Robert Clague Mason
Jemima Corlett Minor Spinster U/R Balla-yolgane, F Thomas Corlett Miner. They both made "their Mark".

John H is actually John Nelson Clague, born Sept 10, 1879 to Robert William Clague and Jemima Corlett. Eldest son Robert F was actually christened July 28, 1872 in Laxey, Lonan as Robert Findley Corlett.

They also had Helena , ch Aug 31, 1881 , but buried 14/10/1881 in Lonan aged 6 weeks, and Cathrine ch Dec 21, 1882.

1891 census Agneash , Lonan

Robert William Clague age 45
Jemima Clague 37
Robert Findley 18
Elenor A 15
John Nelson 11
Cathrine 8
Plus two lodgers.

Appears Jemima was buried Sept 9, 1900 in Lonan aged 46.
Could not find a RWC burial and too many simply Robert Clague to find.

Cheers
David