Robert Walker. Robert Walker was an English portrait painter, notable for his portraits of the Lord Protector Oliver Cromwell and other distinguished parliamentarians of the period.
   He was influenced by Van Dyck, and many of his paintings can now be found at the National Portrait Gallery, London. Walker was the chief painter of the parliamentary party during the Commonwealth of England from 1649-60.
   Nothing is known of his early life. His manner of painting, though strongly influenced by that of Van Dyck, is yet distinctive enough to rule out the possibility of him being one of Van Dyck's immediate pupils.
   He is chiefly known for his portraits of Oliver Cromwell, and our knowledge of Cromwell's appearance is mainly based on Walker's paintings, as well as the portraits of him by Samuel Cooper and by Peter Lely. There are two main types.
   The earlier, representing Cromwell in armour with a page tying on his sash, and the later, full face to the waist in armour, were frequently repeated and copied. The best example of the first type is perhaps the painting now in the National Portrait Gallery. This likeness was considered by diarist John Evelyn to be the truest representation of Cromwell which he knew. There are repetitions of this portrait elsewhere. In another portrait by Walker, Cromwell wears a gold chain and decoration sent to him by Queen Christina of Sweden. Walker painted Henry Ireton, Jo
Wikipedia ...