1861 census Bangor Wales
BYLES John, head, m, 36, Coast guard, born Hampshire
BYLES Jane, wife, m, 35, - , born Pembrokesh.
BYLES Samuel, son, 9, scholar, born Hampshire, Southsea
BYLES Charles, son, 8, scholar, born Sheppey
BYLES William, son, 4, born Hampshire, Landport
BYLES Rosetta, dau, 2, born Carnarvonshire, Bangor
BYLES John, son, 3m, born ditto.
Samuel's mmn JONES, so probably Lettice's
No sign of birth for a Charles BYLES in 1852-3. Is he the Charles Abraham Bureau born Dec qtr 1852. Fits with age and birthplace. See reply #4 by amondg.
Other BYLES children all have mmn as JONES, so probably Jane's.
The trees on Ancestry would appear to have confused the two Jones sisters hence the name Lettice Jane.
Valentine was going by John as well. He died 1900 and Jane in 1901, both in Neyland, Pembrokeshire.
As I said in the previous post you may already know all of this.
Ian C