Speaking of bells and whistles, my favorite example occurred on our site in Tubac. A professor brought out his GPR (ground-penetrating radar) equipment and crew to help us in our excavations. One area that he ran his equipment over showed no anomalies or squiggles. We continued our excavation in that area anyways and discovered a ten foot deep casamata (powderhouse) under the guardhouse. It had been filled in at the top with adobe bricks, which apparently fooled the radar. Anita Cohen-Williams; Reference Services; Hayden Library Arizona State University, Tempe, AZ 85287-1006 PHONE: (602) 965-4579 FAX: (602) 965-9169 INTERNET: [log in to unmask] Owner: HISTARCH