|The Right Honourable
|President of the Board of Control|
|Prime Minister||The Lord Grenville|
|Preceded by||The Lord Minto|
|Succeeded by||George Tierney|
|First Lord of the Admiralty|
|Prime Minister||The Lord Grenville|
|Preceded by||Viscount Howick|
|Succeeded by||The Lord Mulgrave|
|Born||31 December 1755|
|Died||17 December 1846
Background and education 
Grenville was the second son of Prime Minister George Grenville and Elizabeth, daughter of Sir William Wyndham, 3rd Baronet. George Nugent-Temple-Grenville, 1st Marquess of Buckingham, was his elder brother and William Grenville, 1st Baron Grenville, his younger brother. He was educated at Eton.
In 1778, he was commissioned ensign in the Coldstream Guards and in 1779 promoted a lieutenant in the 80th Regiment of Foot, but resigned his commission in 1780. He was, with one interval, a member of parliament from 1780 to 1810, and for a few months during 1806 and 1807 President of the Board of Control (1806) and then First Lord of the Admiralty (1806–1807). In 1798, he was sworn of the Privy Council.
On 1 February Grenville and a party were travelling on HMS Proserpine when she was wrecked off the Elbe. she was trying to deliver Grenville and his party to Cuxhaven, from where they were to proceed on a diplomatic mission to Berlin. Proserpine was stuck in ice in worsening weather. At 1:30, on 2 February, all 187 persons on Prosperine left her and started the six-mile walk to shore, in freezing weather and falling snow. Seven seamen, a boy, four Royal Marines, and one woman and her child died; the rest made it to safety. The diplomatic party reached Cuxhaven a few days later.
He began collecting books from at least his early twenties, and by his death had amassed 20,240 volumes containing 16,000 titles. The collection is notable for its many editions of Homer, Aesop and Ariosto, for early travel books, and for literature in the Romance languages. Rare volumes include a vellum copy of the Gutenberg Bible, which Grenville bought in France in 1817 for 6260 francs, a Mainz Psalter and a Shakespeare First Folio. There are also 59 manuscripts. Grenville liked his books to be in excellent condition, and would have often have books washed or rebound, as well as seeking out relevant pages to add to any incomplete copies he owned. He lent books widely, Barry Taylor describing his library as apparently "semi-public". He bequeathed the collection to the British Museum, of which he had become a trustee in 1830, and it is now housed in the King's Library Tower in the British Library.
Personal life 
Styles from birth to death 
- Mr. Thomas Grenville (1755–1779)
- Mr. Thomas Grenville, MP (1779–1784)
- Mr. Thomas Grenville (1784–1790)
- Mr. Thomas Grenville, MP (1790–1798)
- The Rt. Hon. Thomas Grenville, MP (1798–1810)
- The Rt. Hon. Thomas Grenville (1810–1813)
- The Rt. Hon. Thomas Grenville, MP (1813–1818)
- The Rt. Hon. Thomas Grenville (1818–1846)
- Hepper (1994), p.90.
- Taylor, Barry (2009). "Thomas Grenville (1755–1846) and His Books". In Mandelbrote, Giles and Taylor, Barry. Libraries within the Library: the Origins of the British Library's Printed Collections. British Library. pp. 321–340. ISBN 978-0-7123-5035-8.
- British Library, Named collections of printed materials (G) accessed 22 December 2011
- British Library, The copy on vellum – provenance accessed 22 December 2011
|Wikimedia Commons has media related to: Thomas Grenville|
- British Historical Facts 1760–1830, by Chris Cook and John Stevenson (The Macmillan Press 1980)
- Hepper, David J. (1994). British Warship Losses in the Age of Sail, 1650–1859. Rotherfield: Jean Boudriot. ISBN 0-948864-30-3.
Further reading 
- Payne, J.T., Foss, H. and Rye, W.B. Bibliotheca Grenvilliana. London, 1842–72. Catalogue of Thomas Grenville's library. Copies held by many major scholarly libraries.
- Hansard 1803–2005: contributions in Parliament by Thomas Grenville
- British Library's description of the Grenville Library
- The Grenville Library copy of the Gutenberg Bible. Select the 'vellum copy' option to see images of the Grenville Library copy.