relapse

He had taken the silence of the old man for a return to reason; and now these few words uttered by Faria, after so painful a crisis, seemed to indicate a serious relapse into mental alienation.

“Alas,” murmured Edmond to himself, “this is a terrible relapse!

Now I am clear again, though I dare not think of it too much for fear of a relapse.

Then, seeing the young man was about to relapse into melancholy, “Let us go out, Albert,” said he; “a ride in the wood in the phaeton, or on horseback, will refresh you; we will then return to breakfast, and you shall attend to your affairs, and I to mine.”