Thanks Raven
We have the Gravesend birth certs, but none are conclusive
Births Sep 1869 (>99%) Tyler Mary Ann
Milton 2a
736
Births Mar 1871 (>99%) TYLER Mary Ann
Gravesend 2a
422
Births Dec 1871 (>99%) Tyler Mary Ann E
Milton 2a
745
The first one died aged 3
The second names no father
The third has William as a father, but he is still alive in 1901 after the marriage.
There is some rumour that her father was in the forces, but he may well have just disappeared.
Its a conundrum!!
Mark