My dear D^r Ogle

I am truly obliged for all the great trouble which you have so kindly taken.— I am sure you have no cause to say that you are sorry you can give no more definite information; for you have given me far more than I ever expected to get. The action of the Platysma is not very important for me, but I believe that you will fully understand (for I have always fancied that our minds were very similar) the intolerable desire I had not to be utterly baffled. Now I know that it sometimes contracts from fear, & from shuddering, but not apparently from a prolonged state of fear such as the insane suffer.¹

With very many thanks, | Yours sincerely | Ch. Darwin