That there is but one covenant, whereof baptism and the Lord's-Supper are seals, viz. the covenant of grace; (proved from the word of God) and, the doctrine of an external graceless covenant, lately advanced, by the Rev. Mr. Moses Mather: in a pamphlet, entituled, The visible church in covenant with God, &c. shewn to be an unscriptural doctrine : To which is prefixed, an answer, to a dialogue concerning the half-way covenant; lately printed at New-London. / By Joseph Bellamy, D.D. ; [One line from Isaiah].