§10.44.1Αἰνείας δὲ βουληθεὶς διορθώσασθαι τὴν τοιαύτην ἀπορίαν, ὁ τὰ περὶ τῶν Στρατηγικῶν ὑπομνήματα συντεταγμένος, βραχὺ μέν τι προεβίβασε, τοῦ γε μὴν δέοντος ἀκμὴν πάμπολυ τὸ κατὰ τὴν ἐπίνοιαν ἀπελείφθη.
Aeneas, who composed the treatise on Tactics, wishing to remedy this difficulty, advanced the matter slightly, but his invention still fell very far short of what was required.
§10.44.2γνοίη δʼ ἄν τις ἐκ τούτων.
One may see this from the following.
φησὶ γὰρ δεῖν τοὺς μέλλοντας ἀλλήλοις διὰ τῶν πυρσῶν δηλοῦν τὸ κατεπεῖγον ἀγγεῖα κατασκευάσαι κεραμεᾶ, κατά τε τὸ πλάτος καὶ κατὰ τὸ βάθος ἰσομεγέθη πρὸς ἀκρίβειαν· εἶναι δὲ μάλιστα τὸ μὲν βάθος τριῶν πηχῶν, τὸ δὲ πλάτος πήχεος.
For he says that those who are to signal urgent matters to each other by means of fire-signals must prepare clay vessels, precisely equal in width and depth; the depth should preferably be three cubits, and the width one cubit.
§10.44.3εἶτα παρασκευάσαι φελλοὺς βραχὺ κατὰ πλάτος ἐνδεεῖς τῶν στομάτων, ἐν δὲ τούτοις μέσοις ἐμπεπηγέναι βακτηρίας διῃρημένας εἰς ἴσα μέρη τριδάκτυλα, καθʼ ἕκαστον δὲ μέρος εἶναι περιγραφὴν εὔσημον.
Then they must prepare corks slightly narrower in width than the mouths of the vessels, and in the middle of these, rods must be fixed, which are divided into equal parts of three finger-breadths each, with a clearly marked line on each part.
§10.44.4ἐν ἑκάστῳ δὲ μέρει γεγράφθαι τὰ προφανέστατα καὶ καθολικώτατα τῶν ἐν τοῖς πολεμικοῖς συμβαινόντων, οἷον εὐθέως ἐν τῷ πρώτῳ, διότι" §10.44.5πάρεισιν ἱππεῖς εἰς τὴν χώραν," ἐν δὲ τῷ δευτέρῳ διότι "πεζοὶ βαρεῖς," ἐν δὲ τῷ τρίτῳ "ψιλοί," τούτων δʼ ἑξῆς" §10.44.6πεζοὶ μεθʼ ἱππέων," εἶτα "πλοῖα," μετὰ δὲ ταῦτα "σῖτος," καὶ κατὰ τὸ συνεχὲς οὕτω, μέχρις ἂν ἐν πάσαις γραφῇ ταῖς χώραις τὰ μάλιστʼ ἂν ἐκ τῶν εὐλόγων προνοίας τυγχάνοντα καὶ συμβαίνοντα κατὰ τοὺς ἐνεστῶτας καιροὺς ἐκ τῶν πολεμικῶν.
On each part must be written the most obvious and common occurrences of war: for instance, on the first, "Cavalry are entering the country," on the second, "Heavy infantry," on the third, "Light-armed troops," next to these, "Infantry with cavalry," then "Ships," after these "Corn," and so on in succession, until there are written in all the spaces those events which are most reasonably anticipated and likely to happen in the current circumstances of the war.
§10.44.7τούτων δὲ γενομένων ἀμφότερα κελεύει τρῆσαι τὰ ἀγγεῖα πρὸς ἀκρίβειαν, ὥστε τοὺς αὐλίσκους ἴσους εἶναι καὶ κατʼ ἴσον ἀπορρεῖν· εἶτα πληρώσαντας ὕδατος ἐπιθεῖναι τοὺς φελλοὺς ἔχοντας τὰς βακτηρίας, κἄπειτα τοὺς αὐλίσκους ἀφεῖναι ῥεῖν ἅμα.
When this is done, he orders both vessels to be pierced precisely, so that the discharge-tubes are equal and the water flows out at an equal rate; then, having filled them with water, to put on the corks holding the rods, and then to let the tubes run at the same time.
§10.44.8τούτου δὲ συμβαίνοντος δῆλον ὡς ἀνάγκη πάντων ἴσων καὶ ὁμοίων ὄντων, καθʼ ὅσον ἂν ἀπορρέῃ τὸ ὑγρόν, κατὰ τοσοῦτον τοὺς φελλοὺς καταβαίνειν καὶ τὰς βακτηρίας κρύπτεσθαι κατὰ τῶν ἀγγείων.
When this takes place, it is clear that since everything is equal and identical, in proportion as the liquid flows out, the corks must sink to that extent and the rods disappear into the vessels.
§10.44.9ὅταν δὲ τὰ προειρημένα γένηται κατὰ τὸν χειρισμὸν ἰσοταχῆ καὶ σύμφωνα, τότε κομίσαντας ἐπὶ τοὺς τόπους, ἐν οἷς ἑκάτεροι μέλλουσι συντηρεῖν τὰς πυρσείας, ἑκάτερον θεῖναι τῶν ἀγγείων.
When the aforementioned operations have been made equal in speed and consistent, then, having transported them to the places where each party is to watch for the signals, they are to set up each of the vessels.
§10.44.10εἶτʼ ἐπὰν ἐμπέσῃ τι τῶν ἐν τῇ βακτηρίᾳ γεγραμμένων, πυρσὸν ἆραι κελεύει, καὶ μένειν, ἕως ἂν ἀνταίρωσιν οἱ συντεταγμένοι· γενομένων δὲ φανερῶν ἀμφοτέρων ἅμα τῶν πυρσῶν καθελεῖν.
Then, as soon as any of the occurrences written on the rod happens, he orders to raise a torch, and to keep it raised until the receiving party raises one in response; and when both torches are visible at the same time, to lower them.
εἶτʼ εὐθέως ἀφεῖναι τοὺς αὐλίσκους ῥεῖν.
Then immediately to let the tubes run.
§10.44.11ὅταν δὲ καταβαίνοντος τοῦ φελλοῦ καὶ τῆς βακτηρίας ἔλθῃ τῶν γεγραμμένων ὃ βούλει δηλοῦν κατὰ τὸ χεῖλος τοῦ τεύχους, ἆραι κελεύει τὸν πυρσόν· §10.44.12τοὺς δʼ ἑτέρους ἐπιλαβεῖν εὐθέως τὸν αὐλίσκον, καὶ σκοπεῖν τί κατὰ τὸ χεῖλός ἐστι τῶν ἐν τῇ βακτηρίᾳ γεγραμμένων· §10.44.13ἔσται δὲ τοῦτο τὸ δηλούμενον πάντων ἰσοταχῶς παρʼ ἀμφοτέροις κινουμένων.
And when, as the cork and the rod sink, that of the written messages which you wish to signal comes level with the rim of the vessel, he orders to raise the torch; and the other party must immediately stop up the tube, and look at what of the messages written on the rod is at the rim; and this will be the message signaled, since everything moves at an equal speed on both sides.