|  "COULD I NOT DO THE BUSINESS ALONE IF SIR ROBT CONTINUES INDISPOSED" DAVY
                (Sir Humphry, 1778-1829, Chemist, Inventor of the Miner's safety lamp, mentor of Michael Faraday)
 
 Fine Autograph Letter Signed to John KNOWLES,
                (1781-1841, Biographer of Henry Fuseli, Clerk to the Navy Office, fellow of the Royal Society) saying that he has "made all my arrangements for this visit to Sheerness.  The Bishop of Carlisle was to take the chair of the Royal Society & I have refused a dinner invitation for Friday. Next week on the contrary I have made engagements which I shall find it difficult to break as they are connected with some important business. I hope Sir Robt may be well enough to go. I was at the Navy Board this morning & had I known of the continuation of his indisposition I would have called. Could I not do the business alone if Sir Robert continues indisposed - Pray let me know by tomorrow morning what his ultimate decision is. I think we need not leave London till 10 Thursday & the change of air in a close carriage will perhaps do him good ...", 3 sides 4to., with integral autograph address leaf and seal, no place, Tuesday, no date but circa
 
 Item Date: 
                    1822
 Stock No: 
                    40620
                    
                    
                        £1275
 
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            | DE LA RUE
                (Warren, 1815-1889, British Astronomer and Physicist)
 
 Fine signature glued to album leaf with others on reverse
 
 Item Date: 
                    0
 Stock No: 
                    7261
                    
                    
                        £15
 
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            | DERBY
                (Edward Smith Stanley, 1775-1851, M.P., K.G., President of the Zoological Society, from 1834 13th Earl)
 
 Signature and subscription on  a fragment of a letter
                to 'My Dear Sir', saying he shall "be honoured to comply", 2" x 4½", Knowsley, 4th Septembert
                small defect in one blank corner
 
 Item Date: 
                    1850
 Stock No: 
                    54617
                    
                    
                        £10
 
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            |   DEVONSHIRE
                (Sir William Cavendish, 1808-1891, F.R.S., Chancellor of London and of Cambridge University, Liberal Benefactor, 7th Duke)
 
 Autograph Letter Signed to 'Sir',
                saying he has "great pleasure in placing at your disposal my vacant nomination, to be offered for competition for boys of under the age of 14 years", and that he is "glad ... last year's competition was so satisfactory", 2 sides 8vo black-edged, Devonshire House, Piccadilly, 29th June
                faint trace of transparent guard on side 2 without loss
 
 Item Date: 
                    1871
 Stock No: 
                    56316
                    
                    
                        £45
 
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            | DICKSON
                (Alexander, 1836-1887, Botanist)
 
 Autograph Letter Signed in the third person to Mr Kerrison,
                sending his signature, 1 side 8vo., 11 Royal Circus, Edinburgh, 4th March
 
 Item Date: 
                    1869
 Stock No: 
                    6000
                    
                    
                        £12
 
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