From a cursory inspection of these photographs (I have yet to examine the original) it is my guess that this marble bust might have been outside and exposed to the weather for a prolonged period. It has then been repolished. This would explain the somewhat generalised features and the high gloss appearance - the unfortunate result of overzealous "restoration".
There is an intriguing terracotta bust of Henry Streatfield (1679 -1747) in the Streatfield Mausoleum in St Marys Church, Chiddingstone Kent first pointed out to me by Matthew Craske in 2000.
It is inscribed on the socle H.S. Aet .60. 1739. The modelling of the clothing is extremely close to that on the bust of Jonathan Tyers. It has buttons on the waistcoat which are missing on the Tyers terracotta but can be clearly seen on the marble, indicating that there should be no doubt that the marble bust of Tyers is by Roubiliac.
There are several other examples of the duplication of the clothing on Roubiliac busts, such as the bust of Plato at Trinity College Dublin and various busts of Alexander Pope, the bronzed plaster bust of Nicholas Hawksmoor c. 1735/6 in the Buttery at All Souls College, Oxford (a plaster bust at Christchurch Spitalfields) and the marble bust of William Wither d. 1733 at Wooten St Lawrence, Hampshire - these last two traditionally attributed to Scheemakers but perhaps by Roubiliac working under Scheemakers. The Clifton Reynes and Wootton St Lawrence monuments along with the busts at Trinity College Library would suggest a close working relationship between Roubiliac and Scheemakers in the mid 1730's - I will return to the subject in due course.
It has been suggested that this is because Roubiliac used the same basic moulds for the bodies and draperies of these busts where the clay is pressed into the mould taken from a prototype clay model, and the head modelled and applied separately, equally possible is that he used some sort of pointing machine.
Engraving by George Bickham the Younger, 1741.
19.7 x 32.5 cms.
The central group is taken from the Adieu to Spring Gardens from Bickham's Musical entertainer.
Etching with stipple
Engraving and description from British Museum Website.
Bickham Musical Entertainer.
For more of Bickham's engravings from Bickhams Musical Entertainer see - http://www.panteek.com/index.htm
For Prince Frederick and Vauxhall Gardens and its political meanings see -