The substance of two sermons : one on the total depravity of human nature, while unrenewed; from Gen. 6. 5. The other from Gal. 6. 15. Being a description of the new creature. Delivered at Westborough, Dec. 8. 1765. / - Frost, Amariah, (Printed by D. Kneeland, opposite the probate-office in Queen-Street,, 1766)