Old Jack is seized with an unreasoning sanguineness.
"Somehow Good"
William de Morgan
I surveyed them with a feeling that they might yet be polished into use; and, excited alike by the stimulus of affection on one side and hatred on the other, my mind worked itself from despondency into doubt, and from doubt into the sanguineness of hope.
"Devereux, Book I."
Edward Bulwer-Lytton
Such relations could contain little besides the sanguineness of hope, and the enumeration of hardships and difficulties, which former accounts had not led us to expect.
"A Complete Account of the Settlement at Port Jackson"
Watkin Tench