Good Morning
I've dug a bit deeper with Richard Linford and William Burgess and I do think they are two different men.
Hannah Cook married William Burgess in 1831 ,all was well until 1839 when William was court martialled and throne out of the Royal Marines
https://discovery.nationalarchives.gov.uk/details/r/C10093194However there is a Richard Linford also in the Royal Marines (A Gunner 2d Company and also under foreign and Army marriages )at Portsea about the same time.
In Portsea on 21 Nov 1827 he marries a Catherine Burgess
He signs the register The bride makes a cross.Wit Adaline Bedbrook and Henry Tomlin
It looks like Catherine was William Burgesses sister baptised 20th May 1810 Droxford to William and Anne Burgess.
So the two couples would have known each other .One seems to be your Richard Linford and his wife Catherine/Keturah .
So it Seems Richard Linford born 1810 and wife Hannah are brother in law and sister in law to your couple.Helpfully changing their name to Linford just to make things awkward .
Just to add a little about the Burgesses
William and Anne Burgess had the following children in Droxford
William 17.4.1808,Catherine 20.5.1810,Jessie 17.4.1812-25th and Elizabeth 16.5.1813.
The couple married at Portsea 25.1.1806 William Burgess bach otp and Anne Draper spinster otp wit John Smith and Richard Rudge the clerk
Anne was buried 21 Feb 1815 age 27 years .
William remarried an Elizabeth Jones widow 1.3.1829 again at Portsea who he is with on the 1841 and 1851 censuses and had another daughter Charlotte 25 Oct 1829.(of Hill labourer)
Williams birthplace is Boarhunt Hants in 1781.
Ciderdrinker