This was an important passage because it shows how the aqueduct was linked to the springs near the area of Salone. This is actually where the name of the fountain came from, and was not implemented until the reign of Pope Pius IV. So until this point, the source of the water was not from Salone but instead, a location nearby. In the first century AD, Frontinus was unable to make an exact measurement of the Aqua Vergine, because its source was comprised of small tributaries and streams and springs. So all of the springs were at some point connected into a single collection point, thus making it the beginning of the Vergine. This is made even clearer when we look at the 18th Century, when the present fountain was being built, that, “many bubbles were continually being found at the head of the spring, where Salvi succeeded in reviving and cleaning the principal conduit made of “signino” as long ago as the time of Agrippa and thereby opening up those most abundant sources”. [Signino is a kind of waterproof cement made of lime and broken terracotta].
It is not easy to determine that actual start of the original aqueduct for the Vergine, which is why there is no systematic archeological excavations in this water rich area. The most important fact is that the Salone springs made a lasting contribution to increasing the water flow and the strength of the aqueduct. It was also at this point that the water began to be called the Aqua Salonica over the Aqua Vergine or Aqua di Trevi.
The last name is also the name of the famous fountain, the largest water feature in all of Rome, with its two common explanations. Both explanations are very different and short. The first reason was that the fountain had three pipes, allowing the water to exit the fountain in three ways. The second reason was that the fountain was located where three roads came together. Both tales have no foundation. However the reasoning is more complicated and simpler than all of that. In Latin documents from the 16th century, the name Trevi appeared in one form: Trivium. In Italian, there were many variations of this word, with the earliest being Treio, which later became Trevi.
