DARWIN, Charles (1809-1882). Letter signed ('Charles Darwin') to [Dr Rudolph Heine], Down, 16 (corrected from 15) March [1865], 'I am pleased to hear that you have been interested in my work on the Origin of Species. Your law of inheritance I dare say is true & may have some bearing on the modification of species; but I fear it would be difficult to prove it with sufficient clearness to allow of its use', 2 pages, 8vo, bifolium, a draft letter by the recipient to Sir James Beart Simonds, 7 November 1865, on the subject of horses' teeth occupying the head and foot of the letter, and part of the integral blank. Provenance: Stargardt sale, 26 March 1992, lot 582; private collection.
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