I'm going through some of OH's families in his tree.
I'm adding Ancestry hints to the tree when I spied that in the 1851 Census his 3x-great-aunt Mary Anna (or Ann) Nightingale, the then wife of William Wilkinson had her place of birth transcribed as "Hamburg, Partmouth"!
To me it is quite clear what it really is!
https://www.ancestry.co.uk/interacti...661.1490443243