At the following website, I found a marriage for Jane McGee Donohoe (widow of Thomas Donohoe).

http://neworleanspubliclibrary.org/~nopl/inv/jpmarrindex/bri...

At the bottom of the page are instructions on how to order a copy of the marriage license.

New Orleans (La.) Justices of the Peace.
Index to marriage records, 1846-1880

Bride: Jane McGee Donohoe (widow)
Groom: Francis Shields
Marriage: 19 May 1854
Call#: II VEA 678
Page: 172

Also found another marriage for Francis Shields;

Francis Shields
Mary Cole
21 Jan 1865
VEB 678
870-871