In this view of Rockport, you can see the cold storage building that stood on T-Wharf from 1919 to 1923. (See this post for more information on that building and another view of it.) You can also see Motif No. 1. The picture appears to have been taken from the steeple of the Congregational Church. Main Street runs diagonally from the lower left corner of the image.
The postcard was published by The Rockport Photo Bureau and printed by The Albertype Co., Brooklyn, N.Y. There is no date or postmark. Given that it shows the ice house, it was taken sometime between 1919 and 1923.