Pelham Vol V by Edward Bulwer-lytton

Hinc Canibus blandis rabies venit -- Virgil Georgics.

I should have mentioned, that the day after I sent Glanville Tyrrell's communication, I received a short and hurried note from the former, saying, that he had left London in pursuit of Tyrrell, and that he would not rest till he had brought him to account. In the hurry of the public events in which I had been of late so actively engaged, my mind had not had leisure to dwell much upon Glanville; but when I was alone in my carriage, that singular being, and the mystery which attended him, forced themselves upon my reflection, in spite of all the importance of my mission.