The great Ptolemy worked out our reckoning.

Twenty-four hours, fifteen degrees to each, in all three hundred and sixty degrees.

It is held that the Greeks and the Romans knew fifteen of these hours.

They stretched their hand from Gibraltar and Tangier, calling them Pillars of Hercules, to mid-India.

Now in our time we have the Canaries and the King of Portugal's new islands--another hour, mark you! Sixteen from twenty-four leaves eight hours empty.