Complex sentence: The discovery of the nearby Inglewood goldfield drained Kingower of most of its population in 1859, and from then only a small number of diggers continued working on the field, despite large nuggets still being unearthed from time to time.
Split into simpler sentences: The discovery of the nearby Inglewood goldfield drained Kingower of most of its population in 1859. From then onward, only a small number of diggers continued "working the field," despite large nuggets still being unearthed from time to time.