Sanity, here, is not a condition but a compliance. Through the cases of Frederick Nalty and Jessie Harding, Patient Sanity Manual traces how labour became the language of recovery, gardening as self-restraint, sewing as return to order. The asylum measured wellness through productivity, and productivity through gender.

The Manual itself adopts the cold grammar of institutional record-keeping: checklists, directives, behavioural reports. It does not diagnose. It performs. And in performing, it asks what was ever being measured at all.