The statement of Phrantzes (p. 252), among others, that in the siege of 1453 the charge of the palace and all about it was entrusted to Minotto, the Baillus of the Venetian colony, might be employed in favour of the view that the “turres Avenides” which Leonard of Scio associates with the Xylo Porta, and assigns to Jerome and Leonardus de Langasco, could not be the towers S and N, but the towers of the Heraclian Wall. For the towers S and N, being attached to the Palace of Blachernæ, would fall under the care of Minotto. There is force in the argument. But it is weakened by statements of Pusculus (iv. 173) and Zorzo Dolfin (s. 55), which imply that the palace defended by Minotto was the Palace of the Porphyrogenitus. For both of these writers place the Gate of the Palace (see above, p. 47) between the Gate of Charisius (Edirnè Kapoussi) and the Gate of the Kaligaria (Egri Kapou), and Pusculus describes the palace concerned as “Regia celsa,” an apt description of a building seated, like Tekfour Serai, upon the walls. The references made to the Tower of Anemas, though not under its name, by the Spanish ambassador Clavijo, who visited the Byzantine Court in 1403, should not be overlooked (see _Constantinople, ses Sanctuaires et ses Reliques_, translated into French by Ph. Bruun, Odessa). Speaking of the Church of Blachernæ (p. 15), he describes it as “située dans la ville près d’un châteaufort, servant de demeure aux empereurs; ce fort a été démoli par un empereur, parce qu’il y avait été enfermé par son fils.” The fact that Clavijo identifies the Church of Blachernæ by its vicinity to the Tower of Anemas may be pressed into the service of the opinion that the tower in question stood in the Wall of Heraclius. For there is no more appropriate way of indicating the situation of that church than by saying that it stands a little to the rear of the Heraclian Wall. So appropriate is that mode of identification, that the Patriarch Constantius has recourse to it when, conversely, he indicates the situation of the Tower of Anemas (which he considered to be the southernmost Heraclian tower): “The Tower of Anemas still exists,” he says. “On its side facing the Holy Well of Blachernæ it has a large window, with a smaller one above” (see above, p. 150). But, unfortunately, to describe one building as “near” another is often the most tantalizing aid to its discovery that can be offered. The towers S and N cannot be said to be far from the Church of Blachernæ. Perhaps some injury to one of the Heraclian towers might explain the statement of Clavijo, that the Tower of Anemas had been destroyed; but could he have mistaken the citadel formed by the Walls of Heraclius and Leo for an Imperial residence? Such language suggests rather the towers S and N.