Which preposition to use with subahs

of Occurrences 1%

So we lost two days in discussion with the boatmen, but at last, by doubling their pay, terms were made, and five days after, on the 25th of July, we arrived at Ghazipur, the first place of importance in the provinces of Suja-ud-daula, Viceroy of the Subahs of Oudh, Lucknow, and Allahabad.

Which preposition to use with  subahs