Hi Norrie,
Thanks for getting back to me so quick.
The only info I have on the children is John Henderson being that he is my great great grandfather.
There would be no gravestone for him as he was lost at sea in the Bay of Biscay in the Atlantic Ocean around the 8th December 1886. He was born 17 November 1841 in Fife.
He married Janet Elizabeth Spence in 1865.
Funny story that both John Henderson and John Snr were Naval Captains and both ended up drowning, 1 at sea and the other in a river in Australia.
I have no info on John Snr's parents apart from their names. John Henderson and Catharine Findlay.
Also seems that a Henderson married into another Henderson family.
Janet Elizabeth Spence was born 16 April 1840 in Abbotshall Kirkcaldy and died 27 Nov 1881 Kirkcaldy Fife.
Her parents were:
Thos (or Thomas) Spence b. 1797 Dysart Fife and died 24 Oct 1868 Kinghorn Kirkcaldy Fife.
Agnes Collins b. 1806 Kinghorn Kirkcaldy and died 6 Jul 1862 Abbotshall Kirkcaldy Fife.
Sorry for the long info

That is all on my mothers side, my fathers side is also from Scotland but up in Wick.
Adam