Hi Liz,
Martin's daughter will be looking for grave number 1221 in Braddan where these children were buried:
Edith Annie DIXON, 1 week, Braddan, 19 Apr 1873.
Augustus Joseph Finney DIXON, 6 wks, Braddan, 21 Jul 1874.
George DIXON, 2 mos, Braddan, 8 Feb 1879.
Very many thanks for your help, and also for the help from other people who replied.
Sue