Meanwhile Aratus was struggling up the steep with all his might, slowly and laboriously at first, unable to keep to the path and wandering from it, since it was everywhere sunk in the shadows of the jutting cliffs and had many twists and turns before it came out at the wall of the citadel. Then, marvellous to relate, the moon is said to have parted the clouds and shone out, making the most difficult part of the road plain, until he got to the wall at the spot desired; there the clouds came together again and everything was hidden in darkness.
But the soldiers of Aratus whom he had left at the gate outside near the temple of Hera, three hundred in number, when once they had burst into the city and found it full of lights and manifold tumult, were unable to discover the path which their comrades had taken or follow in their steps. So they crouched down and huddled themselves together in a shaded flank of the cliff, and there remained in great distress and impatience.
For Aratus and his party were now assailed with missiles from the citadel and were fighting, the shouts of the combatants came down the slopes, and cries echoed round about which the reverberations from the hills rendered confused and of uncertain origin. Then, as they were at a loss which way to turn, Archelaüs, the commander of the king's forces, having many soldiers with him, made up the ascent amid shouts and the blare of trumpets to attack Aratus and his party, and thus passed by the three hundred.
These, rising up from ambush as it were, fell upon him, slew the first whom they attacked, put the rest, together with Archelaüs, to panic flight, and pursued them until they were scattered and dispersed about the city. And just as this victory had been won, Erginus came from the party fighting on the heights, with tidings that Aratus was engaged with the enemy, that these were defending themselves vigorously, that a great struggle was going on at the very wall, and there was need of speedy help.
The three hundred at once ordered him to lead the way; and as they took to the ascent their cries signalled their coming and encouraged their friends; the light of the full moon also made their arms appear more numerous to the enemy than they really were, owing to the length of their line of march, and the echoes of the night gave the impression that the shouts proceeded from many times the number of men there really were.
At last, with a united onset, they repulsed the enemy, mastered the citadel, and held its garrison in their power. Day was now breaking, the sun at once shone out upon their success, and the rest of the forces of Aratus came up from Sicyon, the Corinthians readily receiving them by the gates and helping them to seize the king's soldiers.