Definition of sulphur:
- "The Wonder Island Boys: Exploring the Island", Roger Thompson Finlay.
- "Out of Doors--California and Oregon", J. A. Graves.
Already they have the blue, the white, and the red sulphur springs; the sweet and the salt; the warm and the hot, all of which have their several virtues; but the greatest virtue of all these mineral springs is, as in England and every where else, that they occasion people to live regularly, to be moderate in the use of wine, and to dwell in a pure and wholesome air.- "Diary in America, Series One", Frederick Marryat (AKA Captain Marryat).