5 
Hurstbourne Park, and there found the original picture. 
It is dated 1702 and signed by Kneller. The Earl of 
Portsmouth, Newton’s collateral descendent, therefore pos- 
sesses the two most important portraits of Newton. This 
portrait of Newton was engraved also by Smith, about 
1712. A replica, if not an early copy, without any name of 
an artist upon it, is in possession of the Duke of Devonshire 
at Holkar. His Grace informs me that he cannot positively 
trace its coming into the possession of his family, but he 
conjectures that it may have been at Holker before the 
marriage of one of the Lowthers with Lady Mary Cavendish, 
through whom this Holker property passed to the Caven- 
dishes. There is an exact replica or early copy of the 
Portsmouth Kneller of 1689 at Lord Galway’s, except in not 
having the name of Newton or of Kneller upon it, which 
Dr. Crompton has examined, and which, in an old catalogue 
of the pictures, is said to be painted by Bond. Dr. Crompton 
said that he had examined the three oil paintings of Newton 
in the Royal Society’s collection; also the Kneller at 
Hampton Court, which is dated 1689, and differs from the 
Portsmouth Kneller of 1689 only in the position of the 
hands ; also all the portraits of Newton belonging to Trinity 
College, Cambridge; the Indian ink drawing of Newton in 
the Pepysian Library at Magdalen College ; and a portrait 
at Mrs. Miles’, at Firbeck Hall, Yorkshire, which resembles 
very much the Egremont Newton by Kneller, engraved as 
a frontispiece to Sir David Brewster’s first Life of Newton, 
published in the Family Library. Dr. Crompton exhibited 
this edition of Brewster’s life, as well as the larger one in 
two vols. In the text of both the engravings, which differ 
very greatly from each other, are said to be from a picture 
in the possession of Lord Egremont. Sir David Brewster is 
unable to explain how it is that two engravings from distinct 
and different portraits should thus happen to be spoken of 
in the text, except that his publisher must have selected the 
