Of the 25 crew members, 19 made it ashore, but only three survived the winter, the others succumbing to exposure; they were unaware of the presence of the "Grafton" crew castaways to the south.
19 made it ashore. This was of the 25 crew members. Only three survived the winter. The winter was the others. These others were succumbing to exposure. They were unaware of the presence of the "Grafton" crew castaways to the south.