Survey of London: Volume 39, the Grosvenor Estate in Mayfair, Part 1 (General History). Originally published by London County Council, London, 1977.
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Grosvenor House
a. South front in c. 1827-8, showing new gallery by Thomas Cundy I and II (1826-7), and (right) old house as altered by William Porden (1806-8).

Grosvenor House
South front in c. 1827-8, showing new gallery by Thomas Cundy I and II (1826-7), and (right) old house as altered by William Porden (1806-8).
Demolished
b. Design of 1827 by Thomas Cundy II for enlargement, showing proposed new entrance front on south side masking gallery shown above.

Grosvenor House
Design of 1827 by Thomas Cundy II for enlargement, showing proposed new entrance front on south side masking gallery shown above.
Not executed
c. Design of 1827 by Robert Smirke for enlargement, showing south front.

Grosvenor House
Design of 1827 by Robert Smirke for enlargement, showing south front.
Not executed