Hi Norrie
Thanks for taking the time to look at this.
I think you've got the correct children there in Edinburgh.
Elizabeth MUIR died prior to Robert in 1877 and they did have sons James born 1870 & David born 1871.
Address on the death certificates of James WATT & Margaret WATT/HUNTER was Knabbie St, Dunfermline
Address on the death certificate of Robert WATT was South Inglis St, Dunfermline
Further information on the family can be found here:
http://mowatfamilyhistory.ca/2159.htm (not my site).
I think James & Margaret were in the 1861 census at Inverkeithing as Toll collectors (with children James & Catherine) and in the 1851 census at Burntisland.
In 1871 Robert & Elizabeth with sons James & David were at Reform St Dunfermline.
If not at Dunfermline I wonder if James & Margaret may have been buried at Inverkeithing? I would be interested if you have any ideas on where I could look next.
Many thanks
Rebecca