One of my ancestors was born Nov 1783 in Chenies and had himself baptised Dec 1858 in Rickmansworth (six years before his death). Several of his siblings do not also appear to have been baptised either. A brother got himself baptised just before he married but he was in only in his 30s at the time.
My 5x Great Grandad, Samuel Ringrose, does not appear to have been baptised either.
I was helped to work out his lineage, by a member on "Ancestry", who found him in the 1861 Census, with his Sister, Ann Marriott. We then looked at the previous 1851 Census and found Ann in the same place, in Greasley, and with the same sons and daughters, as were with her in the 1861 Census. Her place of birth was put down as: "Hather, Lincolnshire."
Then the Non - Conformist baptism was found for Anne's second Daughter Mary, in 1806 in Nottingham which mentioned Ann's Father being: "Benjamin Ringrose, a Farmer of the parish of Hather."
My Samuel, looking at the age on Census returns, and his age at death, on burial, was probably born in 1784.
Ann, his Sister, was born around 1782.
We know from the "Apprenticeship Record" of their Father, Benjamin, that in 1785, he was residing at Hather.
But looking back on the original parish records, there does not seem to be a baptism for Ann, or Samuel around those years.