See https://en.wikipedia.org/wiki/James_Inglis_(evangelist)
September 1873 J. N. Darby wrote to Mr. Chièze: "The two newspaper editors who had received much light by the brethren (I think I told you about it) have died, and their papers have ceased to appear. May God give us the grace to fill up the gap and to face up to the needs, for it is a vast country." (J. N. Darby: Letters of J. N. Darby. Supplement. From the French, vol. 2, p. 304-305. The original French text is in: “Messager Evangelique” 1906, page 320.)
In April 1873 Darby had written to the same brother "The truth is being spread about more or less clearly by those who are not desirous of walking faithfully themselves and were taking up the position as adversaries. The two main ones amongst them died this year and their journals have ceased to appear. Nevertheless, in spite of themselves, they had really prepared souls to go further." (J. N. Darby: Letters of J. N. Darby. Supplement. From the French, vol. 2, p. 289. The original French text is in: “Messager Evangelique” 1906, page 218.)
I think that one of the two “opposers” was James Inglis (1813-1872), who edited “Waymarks in the Wilderness” (1854-1872) the other perhaps Charles Campbell, who edited “The Scripture Testimony”.
Martin