BULLINGBROOK, (Lincolnshire) bet. the r. Witham and the sea-coast, 4 m. S. E. of Horncastle, and 100 N. from London, was the birth-place of K. Henry IV. from thence surnamed Henry of Bullingbrook; gave title of E. to Oliver St. John, so created by K. James I. and of Visc. to Henry St. John, so created by Q. Anne, when he was one of her secretaries of state, but is now extinct by his attainder in the first year of the late R. for high treason. There is a Mt. on Tu.