Such a setback only made Magellan more determined than ever to find a way round, or through, the South American Continent. So, after a further rest, the expedition proceeded south again, sai- ling into some of the stormiest seas in the world. the wind was sometimes so strong it actually blew them backwards. Ice formed on masts and rigging, making the ships top-heavy, and even more likely to capsize in the raging seas. With only such simple instruments as hour glass and compass, Magellan nevertheless held his wooden galleons to their course for more than 15000 kilometers (over 100 miles) down the rugged coast of what is now Argentina. Only when his crews were drop- ping from cold and exhaustion did he finally seek shelter, in the natural harbour of San Julian. By now the expedition was well into uncharted regions and had reached one of the loneliest places on earth, at almost the c- oldest time of the year. Here, three of Magellan��s Spanish ca- ptains mutinied, planning to sail their ships, the San Antonio, Victoria and Concepcion, back home to Spain as soon as the wea- ther allowed. Although exhausted after weeks with hardly any sleep and little food, Magellan acted swiftly. With the two remaining sh- ips (the Trinidad and Santiaago) still loyal to him, he immedi- ately blockaded the harbour entrance. Then, with his knowledge of tides and currents, he out-manoeuvred the other three ships, recapturing each in turn. In the process, one of the captains, Luis de Mendoza, was stabbed to death. A second captain, Gaspar de Quesada , was afterwards put on trial and executed. Mutinous crew members were condemned to work in chains. Magellan was in command again.