There are a lot of interesting names around the river, and many interesting stories behind each of those names. This will be the first of several posts dedicated to unearthing some of the river's history by better understanding its stories.
In the mid 17th century, Edward Selby was given a land grant of 490 acres in the area of the south side of the South River that then came to be known as "Selby's Marsh." The area is currently very low-lying and it isn't difficult at all to believe that it was, at one time, comprised largely of swamp and tidal and non-tidal wetlands. It is reported by some of the locals that the developers of Selby on the Bay actually trucked sand in during the early 20th century from elsewhere to create the expansive beach that serves the community today.
Over the course of his life, Selby acquired some 1,400 acres on the Mayo peninsula, and by 1688 he owned most of the property between the South and Rhode Rivers.
One of the great things that I discovered doing historical research on the watershed was that in the early 1950s each of the county's public elementary schools undertook a "Discovering Our School Community" report, where they went through reference materials, sought out the oral histories of old timers in the community, and pulled it all together in reports that are available at the public libraries. One of the revealing passages I came across from the kids at Mayo Elementary, the school that served this area in the 1950s, was this one: "The seafood industry, which once played a big part in the economy of Mayo, is on the decline. There is, at present, a scarcity of fish, oysters, and crabs; Therefore, people are unable to earn a living from this work alone."
This was when the County's population was less than 150,000 (it's currently about 500,000) and most of the people living south of the South River were involved in agriculture. Often times, we look back to the mid-1950s as a considerably better time for the South River and the Bay. Accounts like these show that by that period both we were well on their way to decline.
Additional history can be found here.