Rev. John Jeremiah Daniell, in The History Of Warminster, published in 1879, referring to Persons And Things Of Note, wrote:
Sampson Mifflin was a poor boy of Warminster Common. He went to Poole in 1730 to seek employment, and engaged with the captain of a ship in the Newfoundland fishery. Proving faithful to his trust, he was advanced to the command of a vessel, and by honourable industry secured a good fortune. He seems at last to have settled in America. Of his son, nothing is known. His grandson, Thomas Mifflin, a man of stake and position, joined General Washington in the War of Independence, became his Aide-de-Camp and Quarter-Master General, and in 1791 was appointed Governor of Pennsylvania, which commanding office he occupied many years.