E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
denotesof the ages of man, the last; of attributes, wisdom, prudence, integrity, singleness of mind; of birds, the raven or crow; of elements, the earth; of metals, iron or lead; of
planets, Saturn; of precious stones, the diamond; of trees, the olive; of animals, a sort of weasel.