Down, | Beckenham | Kent. S.E. [6 Queen Anne Street, London]
June 25 1870
My dear Sir
I want to beg the favour of a little information, which no one can give me if you cannot do so. In your Early Hist. 1865 p. 41. you shew that the Cistercian monks used certain signs for friend & a wise man, & that they use an almost exactly opposite sign for enemy & fool, that is for objects of an opposite nature.1 You also shew from Burton that certain savages wave their arms in an opposite manner in affirmation & negation; but this case appears a little doubtful for my object, as I suspect that both the nod of affirmation & the lateral shake of negation have had a natural origin.2
Now what I want to know is whether with the deaf & dumb, when from any cause some sign is used for a certain object, quality &c, whether opposi⟨te⟩ signs are used (apparently merely from being opposite) for objects, qualities &c of an opposite nature3
Would you have the kindness to consider this point & permit me to quote the result of your consideration; whether you know of any or many such cases, or after deliberation do not know of any—
Pray excuse me for troubling you & believe me | yours very faithfully— | Ch. Darwin
Please cite as “DCP-LETT-7244,” in Ɛpsilon: The Charles Darwin Collection accessed on