Complex sentence: During 1935 Claude de Bernales commenced on the construction of a 20 head battery by 1937 85,000 tons of ore had been crushed with ₤470,000 worth of gold extracted employing just 130 men the operation returned ₤200,000 to investors in the first two years.
Split into simpler sentences: During 1935 Claude de Bernales commenced the construction of a 20 head battery. Employing just 130 men the operation returned ₤200,000 to investors in the first two years.