Sources:
- Brooklyn Genealogy / Steve Morse mirror, Callaghan surname page
  URL: https://bklyn-genealogy-info.stevemorse.org/Marriage/AZ/C/C.2.html
  Local page: artifacts/evidence/us-vitals/brooklyn-genealogy-callaghan-marriage-index-c2.html
- Brooklyn Genealogy / Steve Morse mirror, Green surname page
  URL: https://bklyn-genealogy-info.stevemorse.org/Marriage/AZ/G/G.19.html
  Local page: artifacts/evidence/us-vitals/brooklyn-genealogy-green-marriage-index-g19.html
- Official NYC Open Data marriage-certificate index
  URL: https://data.cityofnewyork.us/resource/j62e-7maa.json?county=MANHATTAN&number=6724&year=1870
  Local JSON: artifacts/evidence/us-vitals/nyc-marriage-index-patrick-green-elizabeth-callaghan-1870-cert6724.json

What the saved pages say:
- The Callaghan page lists Callaghan, Elizabet, spouse Green, Patrick, marriage year 1870, location Manhattan, certificate number 6724.
- The Green page lists Green, Patrick, spouse Callaghan, Elizabet, marriage year 1870, location Manhattan, certificate number 6724.
- The official NYC Open Data row uses the fuller first name Elizabeth Callaghan and puts both Elizabeth Callaghan and Patrick Green on Manhattan certificate 6724, dated Oct. 19, 1870.

How I am using this:
- This is a second saved index route, independent of the official NYC JSON display, for the same 1870 Manhattan marriage event.
- It strengthens the evidence that Patrick Green's indexed bride was Elizabeth/Elizabet Callaghan.
- It does not prove whether Elizabeth Callaghan and the family-tree Margaret Callaghan are the same person, or whether Margaret was a middle/nickname/name-error situation.
- It does not replace the actual certificate image, which is still the needed source for witnesses, addresses, church/civil context, and any extra identity clues.