Complex sentence: Dobson continued his regular printings until a fire destroyed his business and stock on an early Sunday morning, 8 September 1793; the heat of the fire was sufficient to melt much of his metal print parts.
Split into simpler sentences: Dobson continued his regular printings until a fire destroyed his business and stock on an early Sunday morning, 8 September 1793. The heat of the fire was sufficient to melt much of his metal print parts.