Richard Wetherill the progenitor of the Wetherills of Chester, Pennsylvania was born in Richhill, Northern Ireland in 1788, the son of William Wethereld and Hanna Creeth. Richard was given a letter of "Minute" from the Richhill meeting of the Religious Society of Friends of Ireland for permission to leave Ireland and Immigrate to America. The letter was dated April 26th, 1812 and follows:
To Friends of the Monthly Meeting of New York, America.
Dear Friends: Richard Wethereld having informed us of an intention he had of removing from this order to reside in your parts, he having the consent of his Mother and other relatives concerned therein. We may therefore certify unto you that he is in membership with us, and pretty constantly attended our religious meetings for worship and discipline, and his conduct in a good degree agreeable thereto, and leaves us clear of debts and Marriage engagements. We therefore recommend to your tender care and oversight, and remain your loving friends.
(Read and approved at an adjournment of our Monthly meeting held at Richhill, Ireland, the 26th. day of 4th. Month, 1812.)
Richard Wethereld filed application for naturalization papers and became an American Citizen on 10-26-1821, under the name of Richard Wetherill, the name spelled WETHERILL in the papers and in his signature to the papers.
[See records in court house, Media, Delaware County Pa.]
The following document reproduced by Harvey Leake has an error in the arrival date to America of Richard Wethereld. The original author, Henry Graham Ashmead does not document his research as the Sara document does above. The Sara document above should be used as a source document.
Harvey Leake - Dec 23, 2008 When a young man of twenty-two, in April 1810, [Richard Wetherill] came to America where he engaged in the manufacture of worsted cloth at Green Mills, on Green creek, Concord Township, Delaware County, which must have been the then name of Hannum Mills…. Richard Wetherill, in 1822 leased from George Lewis the Walling-ford paper mills on Crum Creek, Springfield township, Delaware County, wherein he continued until 1828, when he removed to and operated the Waterford mills in Lower Providence, where some seven years later the Sharpless Dye Wood Works were established…. In 1834 Mr. Wetherill purchased in Lower Merion Township, Montgomery County, Pa., mills which he operated successfully. His principal production comprised felt for paper makers, heavy satinett for trouserings, and a cloth known as Linsey Woolsey, used mostly by women for making petticoats. In 1840 he retired, giving the business to his sons, Robert and Isaac Wetherill. In 1842 he purchased a farm in Chester Township, Pa., whereon he resided. Ann (Henvis) Wetherill died in April, 1844, trained to active business life. On September 1, 1845, Mr. Wetherill purchased of Thomas Y. Hutton a grist mill on Ridley creek, a short distance above the Rose Valley Mills, in Nether Providence, which he operated until April 1, 1847…. Mr. Wetherill, then a man of fifty-nine, thereafter resided on and gave his undivided attention to the conduct of his farm in Chester Township, until his death October 22, 1869, in his eighty-second year.*
Richard Wetherill home, 260 W. 24th Chester Pennsylvania.

1788-1869