No More Learning

Thrice, above all, in the course of his life he inter-
vened in this way in the course of European politics—for his two
Letters to the Earl of Aberdeen (on the state prosecutions of the
Neapolitan government, 1851); his Vatican Decrees in their
Bearing on Civil Allegiance (1874), with its sequel Vaticanism
(1875), and his Bulgarian Horrors and the Question of the East
(1876), followed by Lessons in Massacre (1877), sensibly affected
the development of some of the most           political problems
of the times.