Note 8 — I DESCENT AND PARENTAGE; CHILDHOOD AND GIRLHOOD (LEYDEN, THE HAGUE, AND RHEENEN, 1630-1650)
Reading edition
On his visit to England in 1612 Frederick was accompanied by Count Henry of Nassau (who in 1625 became Henry Frederick Prince of Orange). His companion duly fell in love with a daughter of the Duke of Northumberland. (Letters of George Lord Carew.)