Claypoole Genealogy, The Pennsylvania Magazine of History, Vol 14, page 86, quotes Mary's father, James Claypoole: "My Daughter Mary was borne the 14th day 8 Month 1660 near 8 of ye Clock at night in Minsing lane in London." Quaker "8 Month" was October in 1660, and 10 days must be added for leap year correction since 1582, yielding 24 Oct 1660 as the Gregorian Calendar date of Mary's birth.

From Genealogy of the Claypoole Family by Rebecca Irwin Graff, 1893, Pages 56-58 (https://archive.org/details/genealogyofclayp00graf):

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37. MARY CLAYPOOLE (James,5 etc.) was born 8,14,1660,
in Minsing Lane, London. She came to Pennsylvania in
1683, with her father, on the ship Concord; married 4, 24,
1686, in Phila., Francis Cooke, who also came over with
James Claypoole and was associated with him in the affairs
of the Province. She died a widow in 1726, and apparently
without children, as her estate is divided among her rela-
tives. Her will is of much value, as it names so many
members of the family, and is here given entire.

"MARY COOK, WILL, WIDOW.
"That all my just debts be paid herein named, I nominate
my loving brother, George Claypool, of the City, to be the
executor of this my last will.
"I give and bequeath unto my Brother Joseph Claypool
15lbs worth of household goods. I give unto his wife, Id-
dith, my best silver tankard, marked Fc. M. [duplicate?]
"I give and bequeath unto the seven children, now living,
of my Brother Joseph the sum of six pounds each when
they shall come of age, respectfully. The son's age 21 years,
the daughter's 18 years or day of marriage.
"I give unto Jeremiah Claypool, son of Uncle Norton
Claypool, five pounds worth of house hold goods.
"I give unto James, Nathaniel and William, sons of my
Brother, Nathaniel Claypool, the sum of six pounds each at
the age of 21 years.
"I give unto Mary, John and Elizabeth, the children of
Cousin Mary, wife of John Bringhurst, the sum of five
pounds each.
"I give unto Elizabeth, the daughter of my Brother,
James Claypool, 8 pounds in house-hold goods.
"I give unto Martha, the daughter of Brother Nathaniel
Claypool, the sum of six pounds, paid at 18 years of age or
day or marriage, which shall first happen.
"I give unto Lemuel Cook, my husband's brother and
unto Mary, sister of Lemuel and unto Lemuel's daughter
the sum of 20 pounds.
"I give unto Eliza Hill and, Eliza Teague, of the City of
Philadelphia, member of the monthly meeting thereof of
the people called Quakers, the sum of six pounds.
"I give unto my sister Deborah, wife of George Claypool,
my biggest Silver Tankard, marked Fc. M. [duplicate?]
"I give unto a11 the children of my Brother George Clay-
pool, already born and to be born before the term of my
decease, the sum of six pounds, to be equally divided among
them.
"I give unto my Brother George Claypool, his heirs, as-
signs for ever all that my messuage or tenement and lot of
ground in High St., the appurtenances of which I bought
of Jacob Richardson.
"I give unto George Claypool of the rest and residue of
my estate.
"Dated March, 1726. Signed Mary Cook."
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