Meanwhile if chance some desp'rate patient die / […] / Whether ill-tendment, or recureless pain, / Procure his death […]

Smoking is, at heart, oral gratification. There is, shall we say, a certain sexual implication in putting our lips around a long, thin object, ingesting its essence into the mouth, perhaps swallowing it, then expelling it.

a likely topic for investigation.

The cast would need a great deal of machining to become a recognizable finished part.