Li — Trajan to Pliny
There is something in the scheme you propose of opening a communication between the lake and the sea, which may, perhaps, tempt me to consent. But you must first carefully examine the situation of this body of water, what quantity it contains, and from whence it is supplied; lest, by giving it an opening into the sea, it should be totally drained. You may apply to Calpurnius Macer for an engineer, and I will also send you from hence some one skilled in works of this nature.