The posted coordinates will lead you to a small plaque engraved on a rock that marks the beginning of Newport's famous Cliff Walk. All of the information you need to complete the cache can be found on this plaque, and the below substitution will give you the coordinates:
North 41° 29.[C+1][D+1][E-3] West 071° 17.[F+1]GH
The Cliff Walk was:
Developed by estate owners during Newport’s Gilded Age from 188C - 192D.
Designated a national historic walking trail in 19FH.
Restored with federal state city funds by the Cliff Walk Committee from 197G - 197E.
The cache is a typical black nano. Please rehide as you found, and watch for walkers, as they're everywhere here. Hope you enjoy!
If you need to, you can check your coordinates here: GeoChecker.com.