Complex sentence: In 1864, he was allowed to start a second project: a rigged vessel with only one turret and based on the design of HMS "Pallas", and was lent the services of Joseph Scullard, Chief Draughtsman of Portsmouth Dockyard.
Split into simpler sentences: In 1864, Coles was allowed to start a second project: a rigged vessel with only one turret and based on the design of HMS "Pallas". He was lent the services of Joseph Scullard, Chief Draughtsman of Portsmouth Dockyard.