Tarpeia had observed the soldiers from the walls, and her attention had been attracted by the bracelets and rings which they wore; and she finally made an agreement with the Sabines that she would open the postern gate in the night, and let them in, if they would give her what they wore upon their arms, meaning the ornaments which had attracted her attention. The Sabines bound themselves to do this and then went away. Titus Tatius, accordingly, when informed of this arrangement, detailed a strong detachment of troops, and gave them orders to repair at night in a very silent and secret manner to the gate which had been designated as the place where they were to be let in. It is asserted, however, by some writers, that this apparent treachery on the part of Tarpeia was only a deep-laid stratagem on her part to draw the Sabines into a snare; and that she sent word to Romulus, informing him of the agreement which she had made, in order that he might secretly dispatch a strong force to take their position at the gate, and intercept and capture the Sabine party as soon as they should come in. But if this was Tarpeia's design, it totally failed. The Sabines, when they came at midnight to the postern gate which Tarpeia opened for them, came in sufficient force to bear down all opposition; and in fulfillment of their promise to give Tarpeia what they wore upon their arms they threw their heavy bucklers upon her until she was crushed down beneath the weight of them and killed. A steep rock which forms that side of the Capitoline hill is called the Tarpeian rock, in memory of this maiden, to the present day. In this way the Sabines gained possession of the citadel, though Romulus still held the main city. The Romans were of course extremely disconcerted at the loss of the citadel, and Romulus, finding that the danger was now extremely imminent, resolved no longer to stand on the defensive, but to come out upon the plain and offer the Sabines battle. He accordingly brought his forces out of the city and took up a strong position with them, between the Capitoline and Palatine hills, with his front toward the Campus Martius, where the main body of the Sabines were posted. Thus the armies were confronted against each other on the plain, the Romans holding the city and the Palatine hill as a stronghold to retreat to in case of necessity, while the Sabines in the same manner could seek refuge on the Capitoline hill and in the citadel.