Just to insert a note of caution. I don't know about Enniscorthy Workhouse, but the one in Wexford had its own baptismal register. Register not filmed by NLI, and not on any databases.
Baptisms prior to the creation of this dedicated register were recorded in Glynn parish, not Wexford.
Someone can figure out if baptisms are in the Enniscorthy registers, or not, with some effort:
1) Pick last year of Enniscorthy registers online.
2) Look for registration of workhouse births online at Irishgenealogy.ie
3) Look for corresponding baptism in parish registers.
Quite straightforward, but I am not going to do it.