Child first published English and Scottish Ballads in 1857 (vols. 1-4) and 1859 (vols. 5-8), which is not the same as the 1860 edition. Both are an 8-volume edition, but classifications are here and there different and he also substituted his preface completely in 1860. The 1864 edition (I saw only the first volume of it) is substantially the same as the 1860, with minor bibliographic additions.