E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Patmos (My).
My solitude, my place of banishment from society, my out-of-the-way home. As Good-bye, I must go to my Patmos. The allusion, of course, is to the banishment of St. John to the island of Patmos, in the reign of Domitian.