Since the publication of his book Dörpfeld has shifted his ground on this question.[463] He now suggests a new method of explaining away the testimony of Vitruvius. He supposes that Vitruvius, when speaking of the stage in the Greek theatre, was referring, not to the ordinary Greek theatre, but to the peculiar type of Graeco-Roman theatre found in various cities of Asia Minor, such as Termessos and Sagalassos. These theatres, as we have shown, exhibited a sort of transition between the Greek and the Roman model. While their general design was Greek, their stages were partially lowered and deepened, so as to come nearer to the Roman practice.[464] In theatres of this kind Dörpfeld admits that the actors performed upon the stage; and he contends that it is to them that Vitruvius refers, and not to the regular Greek theatres, in which the actors always appeared in the orchestra. But in the first place it is difficult to believe that Vitruvius, when he speaks of the ‘Greek’ theatre, should mean something quite different. Why should he describe as ‘Greek’ a type of building which was not found in Greece proper, and which was essentially a combination of Greek and Roman attributes? In the second place, the evidence of the existing remains is inconsistent with the new hypothesis. Vitruvius says that the proscenium in the Greek theatre should be from ten to twelve feet high, and in ordinary cases about ten feet deep. Now what do we find in the remains of the regular Greek theatres? We find that in the great majority of cases the height and depth answer exactly to this description. But when we turn to the Asia Minor theatres what do we find? The average height is from eight to nine feet, the average depth from twelve to eighteen. In the face of these measurements it is useless to contend that Vitruvius is alluding to the Asia Minor theatres. The type which he describes is the ordinary Hellenistic type.[465]