calling for Catholic help

To my Catholic readers, or anybody else familiar with the nuances of Catholic policy regarding baptism, especially nineteenth-century policy on same:

1) If an adult converts to Catholicism, do they receive a Catholic baptism? Is the answer to that question dependent at all upon whether they were previously baptized in a different Christian denomination? Does age affect it, and if so, what's the cut-off point for different treatment?

2) If there were, for plot reasons, a character who had orig...