However, the 1864–65 drought put paid, at least temporarily, to these ambitions. Goyder was, in the midst of his work in the pastoral zone, asked to do a report on the problem and his response was to find out how far south crop failure had been general. The northernmost point at which crops had not failed was marked as "Goyder's Line of Rainfall" and corresponds approximately to the 300-millimetre (12-inch) annual isohyet (figures vary from 250 to 350 millimetres in different publications).