Picatrix Rubeus page 243:

“The Chaldeans, indeed, were those magi who made themselves preeminent in this science and these workings; and they are held to have been entirely perfect in this science. They themselves assert that Hermes first constructed a certain house of images, from which he used to measure of the flow of the Nile at the Mountains of the Moon; but this house was made of the Sun.”

By the time of the writing of Picatrix, the opinion of whether magic had originated among the Chaldeans or Egyptians was still in flux, and this is an example of the author attempting to find a compromise where both are given credit and prestige.