Which preposition to use with carnarvon

at Occurrences 1%

It so happened, however, that the racing arrangements of the railway had been completely disturbed by the great crowds of visitors, and the result was that I did not reach Carnarvon at the proper time, and my arrival in that place was delayed for nearly an hour.

to Occurrences 1%

Then by Carnarvon to Bethgelert, ascending Snowdon by the way, and in succession by Festiniog, Dolgelly, and Aberystwyth to Hereford (the first time that I had visited it since my father left it).

Which preposition to use with  carnarvon