Marriage Look Up Frankford PA Required

[Swally]

Hi Guys,

I really need to find the details of a marraige in Frankford, PA .
My great uncle Alexander Allan and his wife to be went there from Scotland.
He was Alexander Allan son of Robert & Elspeth (Gordon) Allan born on 1st March1887 in Aberdeen.  She was an Agnes Bowie born 1881 in Newmilns, Ayshire, Scotland.
I think they may have married around 1910 - 1912

If any kind souls could do the necessary I would be obliged.

Thanks in advance,

Swally