Sadly I have no further information. All I know is that his grandson stated in 1926 that his grandparents were Major John Maitland of the 48th Regiment (born in Armagh in 1812), and Margaret Marsh (born in Canterbury in 1820, the daughter of Rev. Marsh of Canterbury.) However, the record of John Maitland's burial in Lucknow, Bengal, India in 1862 gives his age as 57 (i.e. born 1805). He was Quarter Master in the 48th (the Northamptonshire) Regiment of Foot. I hope to visit the National Archives shortly in the hope of obtaining further information. A visit to the archives in Canterbury yielded no further information regarding Margaret or her father.
I have what I believe to be the correct marriage record, which shows the marriage in Gibraltar in 1839 of John Maitland and Margaret FEENY (both parties were widowed). Their known family consisted of 4 daughters (born between about 1840 and 1857), none of whose births/baptisms have been found (I have searched India records, England and Wales, Scotland, Ireland and British overseas births); the youngest daughter was born in Malta, and I imagine that the others were born in various parts of the Empire. All the daughters married in Bengal.
