William and Esther Seawright-1737
Found my second "smoking gun" as below
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From Margaret Gardner-Cannefax's: Cannefax-Gardner and Related Lines pp. 90-94 pub.1972
John Thompson who was born in Northern Ireland about 1690 entered the University of Glasgow 1 March 1706 from which he later received the degree of Master of Arts. He was ordained to the Presbyterian ministry in 1713 by the Presbytery of Armagh, and was licensed by the Ulster Synod, meeting at Antrim on June 23, 1713
Two years later he arrived in this Country. He did not come (with his wife, young daughter Esther, and his sister Esther) as a stranger;
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You will note from above that Rev John Thomson had a sister named Esther. There is no doubt in my mind that this Esther was the one married to William Seawright and they arrived in the Lancaster county, PA area around 1730 to 1735 as recorded by the historians of old. Was suprise that Moses Thomson was not mentioned in the note as above. Moses son, William was born in Lancaster county, PA in 1729 and the Rev John Thomsom's daughter, Esther married a Samuel Crockett in Lancaster county in the same year of 1729.So therefore no doubt on my mind that Rev John, Esther, and Moses were brothers and sister.
I can give more further proof if ask for.
So I am sure as I am on the right track that William and Esther (Thomson) Seawright was not born around 1675, but around 1700. Sincerely, Jim