Complex sentence: After 77 days of unfriendly weather, Cashman and her party located the sick men, who numbered far more than 26; some estimates credit Cashman with saving the lives of as many as 75 men.
Split into simpler sentences: After 77 days of harsh weather, Cashman and her party located the sick men, who numbered far more than 26. Some historical accounts credit Cashman with saving the lives of as many as 75 men.