The difference of eighteen years in Sayce's two dates for the rise of Dynasty I.
Other conjectural identifications of groups of symbols with the place-names Hamath, Marash, Tyana are bases of Sayce's system.
Messerschmidt in his Bemerkungen (1898); but Sayce's system, which has been approved by Hommel and others, is probably in its main lines correct.
Sayce's phonetic values and interpretations of determinatives are his best assured achievements.
In some significant cases, however, the Boghaz Keui tablets appear to give striking confirmation of Sayce's conjectures.
Sayce's interesting article in Philological Society (1877-1878), pp. I-20.