ROBERT, physician, and mathematician, was descended of a respectable family in Wales, and lived in the time of Henry VIII., Edward VI., and Mary. The time of his birth is not exactly known, but it must have been about the beginning of the 16th century; for he was entered of the university of Oxford about 1525, and was elected fellow of All-Souls college in 1531. As he made physic his profession, he went to Cambridge, where he was honoured with the degree of doctor in that faculty in 1545, and very much esteemed by all who were acquainted with him, for his extensive knowledge of many of the arts and sciences. He afterwards returned to Oxford, where he publicly taught arithmetic and mathematics, as he had done prior to his going to Cambridge, and that with great applause. It appears that he afterwards went to London, and was, it is said, physician to Edward VI. and to Mary, to whom some of his books are dedicated; yet he died in the king's-bench prison, Southwark, where he was confined for debt in the year 1558, at a very immature age.

He published several works on mathematical subjects, chiefly in the form of dialogue between master and scholar, of which the following is a list.

The Pathway to Knowledge, containing the first principles