JOHN, an eminent mathematician, was the second son of John Blagrave of Bulmarsh-court, near Sunning in Berkshire. He was sent to St John's College, Oxford, where he applied himself chiefly to the mathematics; and afterwards retired to Southcote-lodge, near Reading, where he spent the remainder of his life. He died in 1611, and was buried in the church of St Lawrence, where a sumptuous monument was erected to his memory. He is said to have been eminently distinguished for his benevolence, candour, and generosity. His published works are:

1. A Mathematical Jewel, Lond. 1585, folio; 2. Of the Making and Use of the Familiar Staff, Lond. 1590, 4to; 3. Astrolabium Uranicum Generale, Lond. 1596, 4to; 4. The Art of Dialling, Lond. 1609, 4to.