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with sixteen 1.174 wheels he constructed a wooden house able to accommodate one hundred men, who were to move the machine pushing from within; and above the structure a wooden tower having five decks, so that on each deck indeed there would be eight of the Latin bows called tzangrai shooting arrows, which were to drive away those on the wall by shooting them. And when the machine was already completed, and both the soldiers and those assigned to move the tower, the rest of the entire army, when the standards were raised and the trumpet had sounded, began to assault the wall; but the tower, being moved by those pushing from within, went at a walking pace, so that it seemed to move as if it were breathing. For no one of those within was seen from anywhere, for which reason it was not possible to be shot. And when they came within range of shooting, those from the wooden tower shot those on the walls; and they, having nothing with which to retaliate, and since the arrows shot from the tzangrai, due to their power and force, passed and penetrated through every weapon, being wounded by them, and some even dying, they held out for a short while, then they withdrew, leaving the wall deserted. And when the wooden tower was just about to join with the walls of the city, something of this sort happened. In front of the city walls had been constructed long ago a portico for receiving water; and having been covered with timbers and planks, 1.175 with earth also placed on top, it was hidden from view, and no one, not even of the locals, knew it had been hidden since ancient times. Therefore, the timbers supported wagons and whatever other weights passed over it. But when the tower came upon it, they being shattered by the weight, it was swallowed up in the portico. Therefore, of those who were inside, no one died, but all were saved; Philippopolis, however, having come so close, escaped being captured. For those inside took courage again, and mounting the wall they defended it, and the rest of the army ceased assaulting the wall. And at the same time the nobles of the Mysians, since their king Terter had died without an heir, summoned Michael, the ruler of Vidin, son of their despot Stracimir, who traced his lineage from Mysians and Cumans, and appointed him their king, and they handed over Tirnovo, in which their palace also is, and the rest of the dominion. And he, gathering both his own army and no small force from the Hungro-Vlachs by alliance, and also taking along a Scythian force, did not think it necessary to attack the emperor of the Romans who was besieging Philippopolis; for he knew that he was not an equal match. But he proceeded against the cities which had joined the Romans after the death of Terter, situated in the mountains, affording safety to the Scythians campaigning with him and the other allies who were archers, and remaining there he ravaged the land and besieged the cities. And when 1.176 these things were reported to the emperor, it seemed best to him, after deliberating with those in authority, to abandon the siege of Philippopolis, and to march against Michael to fight with him. And having so decided, the emperor ordered the despot of the Mysians, Voesilas, to go home, since it was nearby, and having prepared both himself and the army under him with what they would need for the battle, to come to Potouka on the third day, which was a small town that had been destroyed from some war, as it seems, and it was distant from the place where Michael was encamped a one day's journey, as the emperor would wait for him there. He therefore went home to Kopsis to prepare for battle; and the emperor, of Stenimachos and Tsepaina having appointed George Bryennios as general, and having left behind an army sufficient for defense so that they would not suffer harm from the Philippopolitans who were raiding the country, he himself, setting out with the whole army, came to Potouka, to wait there for Voesilas according to the agreement. And while he was encamped there, someone came and reported that Voesilas had died suddenly; at the time, therefore, it seemed that the man was lying and saying nothing sound; after

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τροχοῖς ἑκ 1.174 καίδεκα οἰκίαν κατεσκεύασε ξυλίνην δυναμένην ὑποδέξασθαι ἄνδρας ἑκατὸν, οἳ ἔμελλον τὴν μηχανὴν κινεῖν ἔνδοθεν ὠθοῦντες· ὑπεράνω δὲ τοῦ οἰκήματος ξύλινον πύργον καταστρώματα ἔχοντα πέντε, ὡς ἐν ἑκάστῳ δὴ καταστρώματι τῶν ἐκ τόξων Λατινικῶν τῶν λεγομένων τζαγγρῶν ἀφιέντων βέλη ἐσομένων ὀκτὼ, οἳ ἔμελλον τοὺς ἐπὶ τοῦ τείχους βάλλοντες ἀπώσεσθαι. τελεσθείσης δὲ ἤδη τῆς μηχανῆς, καὶ τῶν τε ὁπλιτῶν καὶ τῶν ἐπὶ τῷ κινεῖν τὸν πύργον τεταγμένων, ἡ μὲν ἄλλη πᾶσα στρατιὰ τῶν σημαίων ἀρθέντων καὶ τῆς σάλπιγγος σημηνάσης, ἐτειχομάχουν· ὁ πύργος δὲ ὑπὸ τῶν ἔνδοθεν ὠθούντων κινούμενος, ᾔει βάδην, ὡς δοκεῖν αὐτὸν ἐμπνέοντα κινεῖσθαι. οὐδὲ γὰρ ἑωρᾶτό τις τῶν ἔνδοθεν οὐδαμόθεν, διὸ οὐδὲ βάλλεσθαι δυνατὸς ἦν. ὡς δὲ ἐν ἐφικτῷ ἐγένοντο τοῦ τοξεύειν, οἱ μὲν ἀπὸ τοῦ ξυλίνου πύργου ἔβαλλον τοὺς ἀπὸ τῶν τειχῶν· αὐτοὶ δὲ μήτε τι ἀντιδρᾷν ἔχοντες, καὶ τῶν ἀπὸ τῶν τζαγγρῶν ἀφιεμένων βελῶν διὰ κραταιότητα καὶ ῥύμην διὰ παντὸς ὅπλου χορούντων καὶ διαδυομένων, τραυματιζόμενοι ὑπ' αὐτῶν, οἱ δὲ καὶ ἀποθνήσκοντες, μικρὸν μὲν ἐκαρτέρησαν, ἔπειτα ἀπέστησαν, τὸ τεῖχος ἔρημον καταλιπόντες. μέλλοντος δὲ ὅσον οὔπω τοῦ ξυλίνου πύργου τοῖς τείχεσι τῆς πόλεως συμμίγνυσθαι, τοιοῦτόν τι συνέβη. πρὸ τῶν τῆς πόλεως τειχῶν ἦν ἐκ παλαιοῦ κατεσκευασμένη στοὰ πρὸς ὑποδοχὴν ὕδατος· ξύλοις δὲ καὶ σανίσι στεγα 1.175 σθεῖσα, ἐπιτεθείσης ἄνωθεν καὶ γῆς, ἦν ἐν τῷ ἀφανεῖ, καὶ οὐδεὶς οὐδὲ τῶν ἐγχωρίων ἐκ χρόνων ᾔδει παλαιῶν κατακεκρυμμένην. ἁμάξας μὲν οὖν καὶ ὅσα δι' αὐτῆς διήρχετο βάρη, ἔστεγον τὰ ξύλα. ὡς δὲ ὁ πύργος ἐγένετο κατ' αὐτῆς, διαθραυσθέντων τῷ βάρει, κατεχώσθη ἐν τῇ στοᾷ. τῶν μὲν οὖν ἔνδον ὄντων ἀπέθανεν οὐδεὶς, ἀλλὰ διεσώθησαν πάντες· ἡ μέντοι Φιλιππούπολις παρὰ τοσοῦτον ἐλθοῦσα διέφυγεν ἁλῶναι. οἱ γὰρ ἔνδον ἀναθαρσήσαντες, ἀναβάντες ἠμύνοντο ἐπὶ τὸ τεῖχος, καὶ ἡ λοιπὴ στρατιὰ ἐπαύσαντο τειχομαχοῦντες. ὑπὸ δὲ τοὺς αὐτοὺς καιροὺς οἱ τῶν Μυσῶν δυνατοὶ, τοῦ βασιλεύσαντος αὐτῶν Τερτερῆ ἀδιαδόχου ἀποθανόντος, τὸν τῆς Βιδύνης ἄρχοντα Μιχαὴλ τοῦ παρ' αὐτοῖς δεσπότου τοῦ Στρεαντζιμήρου υἱὸν ἐκ Μυσῶν καὶ Κομάνων τὰς τοῦ γένους ἕλκοντα σειρὰς προσκαλεσάμενοι ἀπέδειξαν βασιλέα ἑαυτῶν, καὶ τὸν Τίρνοβον, ἐν ᾧ καὶ τὰ βασίλεια αὐτῶν ἐστι, παρέδοσαν καὶ τὴν ἄλλην ἀρχήν. ὁ δὲ τήν τε ἰδίαν στρατιὰν συναγαγὼν καὶ ἐξ Οὐγκροβλάχων κατὰ συμμαχίαν οὐκ ὀλίγην, ἔτι δὲ καὶ Σκυθικὴν παραλαβὼν, βασιλεῖ μὲν τῷ Ῥωμαίων Φιλιππούπολιν πολιορκοῦντι ἐπιέναι οὐκ ἔγνω δεῖν· ᾔδει γὰρ ἀξιόμαχος οὐκ ὤν. κατὰ δὲ τῶν μετὰ τὴν Τερτερῆ τελευτὴν τοῖς Ῥωμαίοις προσθεμένων πόλεων ἐχώρει ἐν τοῖς ὀρεινοῖς κειμένων ἀσφάλειαν παρέχουσι τοῖς συστρατευομένοις αὐτῷ Σκύθαις καὶ τοῖς ἄλλοις συμμάχοις οὖσι τοξόταις, καὶ καθήμενος ἐδῄου τὴν γῆν καὶ τὰς πόλεις ἐπολιόρκει. ὡς δὲ 1.176 ἠγγέλθη ταῦτα τῷ βασιλεῖ, μετὰ τῶν ἐν τέλει βουλευσαμένῳ ἐδόκει τὴν μὲν πολιορκίαν Φιλιππουπόλεως καταλιπεῖν, κατὰ δὲ Μιχαὴλ ὡς αὐτῷ μαχεσομένους χωρεῖν. οὕτω δὲ βουλευσαμένοις, τὸν μὲν τῶν Μυσῶν δεσπότην Βοησίλαν οἴκαδε ἐκέλευεν ὁ βασιλεὺς ἀπελθόντα, ἐπεὶ πλησίον ἦν, καὶ αὐτὸν καὶ τὴν ὑπ' αὐτὸν στρατιὰν ὧν ἂν δέοιτο πρὸς τὴν μάχην παρασκευασάμενον, εἰς τρίτην ἡμέραν εἰς Ποτοῦκαν ἐλθεῖν, ὃ πόλισμα ἦν κατεσκαμμένον ἔκ τινος ὡς ἔοικε πολέμου, ἀπεῖχε δὲ τοῦ τόπου, οὗ ἐστρατοπεδεύετο Μιχαὴλ, μιᾶς ἡμέρας ὁδὸν, ὡς ἐκεῖ τοῦ βασιλέως αὐτὸν περιμενοῦντος. ὁ μὲν οὖν οἴκαδε εἰς Κόψιν ἀπῆλθεν ἐξαρτυσόμενος τὰ πρὸς μάχην· βασιλεὺς δὲ Στενιμάχου καὶ Τζεπαίνης Βρυέννιον τὸν Γεώργιον στρατηγὸν καταστήσας, στρατιάν τε ἀρκοῦσαν πρὸς φυλακὴν καταλιπὼν ὥστε μὴ κακῶς ὑπὸ τῶν Φιλιππουπολιτῶν ὑπεκθεόντων τὴν χώραν πάσχειν, αὐτὸς ἄρας παντὶ τῷ στρατεύματι, ἦλθεν εἰς Ποτοῦκαν, ὡς ἐκεῖ τὸν Βοησίλαν κατὰ τὸ σύνθημα περιμενῶν. στρατοπεδευομένῳ δὲ ἐκεῖ ἀπήγγειλέ τις ἐλθὼν, ὡς ἐτεθνήκει Βοησίλας ἐξαπίνης· τότε μὲν οὖν ἐδόκει ψεύδεσθαι ὁ ἄνθρωπος καὶ οὐδὲν λέγειν ὑγιές· μετὰ