Complex sentence: His father was Thomas Bonnar a house-painter and interior designer of considerable skill, and the son, having from his early years evinced a remarkable aptitude for drawing, was apprenticed to one of the leading decorators of the time.
Split into simpler sentences: His father was Thomas Bonnar a house-painter and interior designer of considerable skill. Bonnar showed an early aptitude for drawing, and was apprenticed to one of the leading decorators of the time.