The 'North Side' would be a tidal island for quite a while until the old river mouth silted up so that will be the place in the newspaper. There was a cottage there in the earlier part of the 20th century, but how far back does that building go?? Also an an on-line small scale map of the 1860s, a few buildings are shown.
I cannot find anyone with a strange address such as the "North Side" on the 1891 or 1901 census returns in the Amble Parish which is a bit of a mystery.
We need a look at the 6 inch to the mile Victorian ordnance survey maps for a better idea.
North Side Cottage:
http://www.fusilier.co.uk/amble_phot.../boat_race.htm