Here is a sloop setting sail from Rockport Harbor around 1908. The postcard is postmarked Jul 20, 1908. It was published by The Rotograph Co., New York City, and printed in Germany.
To the left you see the breakwater that protects the harbor from gales. The original breakwater was constructed by the U.S. government from 1836 to 1840. The first derrick ever erected in Sandy Bay was built to help supply the granite for this project.