Note 049
The respectful salutation of carrying the hand to the mouth, ad os, is the root of the Latin word, adoro adorare. See our learned Selden, (vol. iii. p. 143 - 145, 942,) in his Titles of Honor. It seems, from the 1st book of Herodotus, to be of Persian origin.

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The History Of The Decline And Fall Of The Roman Empire —Fall In The East —Chapter 53