The caption on this postcard says, “Fresh Water Pond near Bathing Beach — Turks Head Inn — Rockport Mass.” Although it’s not labeled as such, this appears to me to be Henry’s Pond, just across the street from Pebble Beach. Google Maps calls this Camborne Pond, but I’ve never heard that name before.
A Purple Gallinule
In 1875, Henry’s Pond gained widespread notoriety among birdwatchers and naturalists when a man named Robert Wendel shot a Purple Gallinule there. The bird is found in Florida, the Caribbean and South America, but rarely this far north. The shooting was reported in a number of journals and books. To this day, Henry’s Pond is a popular location for birdwatchers — and most Rockporters know the swans that live there.
The Turk’s Head Inn, mentioned in this postcard, was farther up South Street, at the location where the Cape Hedge Inn now stands.
Vintage Rockport 
The roof deck on the house on the far right is too cool!
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Camborne Street is near the pond
According to the US Board on Geographic Names, Camborne Pond is the official name of Henry’s Pond. They do have Henry’s as a local usage name. Remember that street names, and others, in
the south end development were all drawn from Cornwall, in the UK. Penzance and Camborne are both towns in Cornwall.