Scale 1:12. Plan shows the stern carving and figurehead for the Archer class torpedo cruiser Porpoise (1886). Annotations on the plan states that this plan was submitted and noted on 15 March 1886 and bears the signatures of P. Darley [Overseer at Clydebank Engineering & Shipbuilding Co] and T. Palmer [Overseer at Clydebank Engineering & Shipbuilding Co]. This plan is fragile, torn into 3 pieces and is in need of conservation.