Archibald Henry Sayce - Patriarchal Palestine стр 13.

Here, then, as late as the fifteenth century before our era we have a king of Jerusalem who owes his royal dignity to his god. He is, in fact, a priest as well as a king. His throne has not descended to him by inheritance; so far as his kingly office is concerned, he is like Melchizedek, without father and without mother. Between Ebed-Tob and Melchizedek there is more than analogy; there is a striking and unexpected resemblance. The description given of him by Ebed-Tob explains what has puzzled us so long in the person of Melchizedek.