Good Afternoon
I assume you've found the widows pension records for Jane which says John died in Bangalore in 1820.
His burial record confirms him as Leut John Wilton born 1783 and buried 28.8.1820
He is recorded as an Officer in the Army from 1810 -Officers in Penisula War against Napoleon ,but the clincher is
John Wilton substitute (ie filling in for someone else who was called up) 1803 53 rd Foot Army Reserve Doncaster West Yorkshire.
The only possible baptism in the County of West Yorkshire is at Shefield.(Other other one is at Wath s of John and Mary 21.3.1785 N.York)
John Wilton 11.11.1781 son of Robert and Ruth Wilton .button maker.
The couple married at Sheffield cathedral 6.6.1780
Robert Wilton and Ruth Heald wit John Lee and Thomas Hall who seem to be the clerks.
Children John,Hannah 25.12.1783-24.4.1785,Sarah 16.4.1786-20.11.1796 ,Elizabeth 29.10.1788 ,Mathew 12.6.1791-29.1.1792 ,Lidia 24.5.1793 (only one as lab)-23.9.1793 ,Harriet 11.2.1795,James 28.2.1800,Benjamin buried 28.9.1806,Mary 23.6.1802-28.1.1817(Park Sheffield)
Robert buried 10.5.1808 button maker Ruth remarried at Rotherham Minister Richard Pearson lab 19.8.1810.Both widowed. Wit John Bamforth and Benjamin Taylor.
She was buried back at Sheffield 19.6.1818 w of Richard Pearson . Born 1761.
It looks like she was the daughter of Benjamin Heald button maker 5.6.1763 Sheffield which would explain where the Benjamin came from.
Not doing so well with Robert Wilton.
But you were right
Ciderdrinker