Nolan Scheid's Ferrocement Castle in Eugene OR, unusual snowy day on March 2006 Multi ton boulders are natural stone "effluvia" thrown from a volcanic eruption ( prolly Canadian area) from millions of years ago.

Boulders were buried directly UNDER the building site, had to excavated, manually over time, one at a time, and now flank the entry as a testament to determination of the builder.- posted by Charmaine Taylor www.dirtcheapbuilder.com

view at his website under BOOKS DVDS- HERE IS THE LINK http://store.yahoo.com/mortarsprayer/bovidv.html anyone can email me for a large version sent via email...amazingly lovely castle after all those years of work