the fi eld of historical linguistics is so wide and challenging that it can hardly be exhausted. Any new eff ort brings along diff erent points of view, and any restatement of a specifi c issue, even by the same author, implies an advancement. Reconsidering the same ma er from a diff erent perspective and with the opportunity to incorporate recent research leads to new, o en unexpected, results and contributes to the collective eff ort of advancement in science.