This is the third book Kenneth Roberts wrote about dowsing, and specifically about the experiences of Henry Gross, a trained dowser, and the company formed by Kenneth Roberts, Water Unlimited. The evidence is in- and the conclusions are inescapable:- in the hands of Henry Gross a dowsing rod performs miracles, and- given the proper information, Henry Gross can spot water sources at almost incredible distances. Kenneth Roberts, bitter over the carping criticism and doubts and aspersions cast upon the achievements, has brought the evidence together. It seems unanswerable. Even the other types of dowsing,- for oil, for minerals, etc., have had their measure of success, though Roberts, up to his death, did not go all out for these claims-and in this book presents the plus and minus aspects fairly.