The Samuel Brown who married Ann Clark you mentioned, is the son of George Brown and Mercy Wright, written about in Colonial and Revolutionary Familes of Pennsylvania, see quote: "George Brown and Mercy, his wife, landed at New Castle in 1679,from Leicestershire, England and at once settled in Falls township, Bucks county, on the upper line of what became Penn's Manor of Pennsbury, where land was surveyed to him under authority of the Duke of York. He purchased two hundred acres in Falls Township, Bucks County, Pennsylvania, from Sir EdmundAndros. The land purchase, on the Delaware River, bordered what was later known as "Penn's Manor," the estate of William Penn. George was commissioned a Justice for "Upland and its Dependencies", May 24, 1680, being the first Englishman commissioned in Pennsylvania."