Pat, I don't know if this will help you or not but here is the info I have (I searched Milton and Leander in my database and did not find them although what I did find could be ancestors of them).
Honorable John Briggs 1609-1690 married Sarah Cornell Son Thomas Briggs is my ancestor and his brother is Job Briggs Sr. 1648-1733 married Elinor UNKNOWN Job Briggs Jr. married Mary Coggeshall daughter of John Coggeshall of Portsmouth RI (a very prominent early settler) and their son... George Briggs 1734-1816 married Hannah Coggeshall (I don't have her parents name). George was born in Portsmouth, RI and died in Smyrna, Chenango Co., NY.George and Hannah had three sons, Stephen b. 1756, John b. 1758 and Giles b. 1761.Then George married Sarah Wells and they had George b. 1767, Elizabeth b. 1769, Arnold B. 1770 and Isaac b. 1771.
Good luck on tying in your ancestors.I will send you some information by email also.