SLEEP AND AWAKENING 19 
In 1487 Bartholomew Diaz sailed from Lisbon with 
three ships to look for the mythical Prester John in 
Ethiopia. He crossed the whole breadth of the Torrid 
Zone and his crew, first amongst sailors, realised the truth 
of the scientific deduction that a second Temperate zone 
lay beyond. After erecting a monument at Cape Voltas 
The Sea Route to India. An Early Map. 
(From Nordenskiold’s Facsimile Atlas.) 
(26° S.) Diaz was driven by a storm far out into the South 
Atlantic and for thirteen days his flotilla was at the mercy 
of the winds. The weather grew bitterly :cold and his 
men might well believe they had crossed the Temperate 
zone as well and were driving towards the new terror of 
a South Frigid Zone, for they were in the great current 
partly of Antarctic, partly of abysmal oceanic water 
