Complex sentence: His telegraph office charged five dollars to send a message anywhere in the world, but unknowing prospectors sent news to their families back home without realizing there was no telegraph service to or from Skagway until 1901.
Split into simpler sentences: His telegraph office charged five dollars to send a message anywhere in the world. Consequently unknowing prospectors sent news to their families back home without realizing there was no telegraph service to or from Skagway until 1901.