Claims to a favourable verdict must now be substantiated in this field and in this field alone.
Before the ratification of his exchange he obtained command of some vessels, and conducted various naval attacks against the English; and having, on his return to France in 1760, fallen accidentally into their hands, he was, on the ground of having broken his parole, thrown into prison at Portsmouth, but as the charge could not be properly substantiated he was soon afterwards released.
This latter charge, though proved to the satisfaction of the committees of both Houses of Parliament, broke down under the cross-examination of the government witnesses by the counsel for the defence, and could indeed only have been substantiated by a dangerous stretching of the doctrine of constructive treason.
An African origin has also been suggested for the hollow-horned ruminants (Bovidae); and if this were substantiated it would explain the abundance of that family in Africa and the absence from the heart of that continent of the deer-tribe.
No defence apparently was possible; there are hints, not well substantiated, of treachery; there is greater probability of surprise.