As I have been following the Bell cases in regard to intertidal property in the State of Maine, I have found several, very interesting sources for Colonial law.

This first one describes intertidal ownership and the exceptions of navigation, fowling and fishing. https://www.mass.gov/files/documents/2016/08/qm/colonialordinancesof1651.pdf

Secondly, this is the Agreement of the Settlers of New Hampshire. https://oll.libertyfund.org/titles/lutz-colonial-origins-of-the-american-constitution-a-documentary-history