In a paper about the Catholic recusants who were held in the Bishops Palace at Ely during the reign of Elizabeth I, Francis Young comments on Sir Thomas Tresham, who died on September 11, 1605, just about three months before the Gunpowder Plot was discovered:
Thomas Tresham, born in 1543, was the son of John and Eleanor (Catesby), but his father died young and his grandfather, also named Thomas, helped raise him. He was knighted by Elizabeth in 1575 but became a Catholic in 1580. As this site explains, that cost him:
Francis Tresham--who might have been the one who sent the warning letter to Lord Mounteagle--died in the Tower of London on December 23, 1605. Thomas's second son Lewis inherited the estates and was named a Baronet by James I in 1611 and knighted in 1612. After Lewis's son William died without an heir, the baronetcy became extinct.