Swallow: a new almanack for the year of our Lord God, 1731 : being the third from bissextile or leap-year: and from the world's creation 5680. Calculated properly for the famous university and town of Cambridge, where the North-Pole is elevated 52 degrees 12 min. above the horizon: any may serve indifferently for any other place of this kingdom. - Swallow, John. (printed by J. Janeway, for the Company of Stationers,, 1731)