This view of Rockport, taken from White Wharf and looking out over Old Harbor, is copyright 1905 and postmarked 1906. It was published by The Rotograph Co. of New York City.
It is interesting to compare this photo on the town of Rockport website taken from a similar vantage point in contemporary times. Other than the boats, not a lot has changed. Note the steeple of the Congregational Church in both photos.