An agreement, upon suf-flcient consideration, to do or not to do a particular thing. 2 Bl. Comm. 442 ; 2 Kent, Oomm. 449. Justice v. Lang, 42 N. Y. 496, 1 Am. Rep. 576; Edwards v. Kearzey, 96 U. S. 599, 24 L. Ed. 793; Canterberry v. Miller, 76 111. 355
