Dear Sir,
Thank you very much again for your explanation, which is pretty helpful and precious for a non-native speaker of English like me. Based on any of EN-JP dictionaries, it would be never ever possible to get to this correct understanding. Mr. Brown seems to use often words whose meanings cannot be found in EN-JP dictionaries. Actually, there are a lot of wrong translated sentences in the Japanese version of “Origin” published in Japan. So I’ve been trying to read the original English version. Many thanks again.