This from: "Evangelical Seceders from the Church of England, c. 1800-1850 by Grayson Carter (Vol. II) p275 "Letters of John Nelson Darby, ed. by J.A. Trench, 3 vols. (London, 1886) The letters listed above, were "Extracts" and were published in 1881, before the "Trench" versions. Probably a different Editor.