As Dr. Bill, Rei, and Brian have pointed out, it is most certain that any cognizant resident of Judea would have ample physical, political, and intellectual contact with both Egyptian and Babylonian cultures over extended periods of time to acquire sufficient knowledge or have at hand folklore from which to draw an accurate literary picture of cities constructed with mud bricks.
The faulty "theory" that I repeated and thereby perpetuated regarding "how could Hebrew scribes centuries removed from Ramses' period know about building materials other than those commonly used in Jerusalem" is bogus and simply a result of my own couch-potato, Discovery Channel mental laziness.