Rules to be observed by masters and pilots of vessels, arriving at the port of Philadelphia, established by the health law, and regulations of the Board of Health, to which is annexed, a supplement to the health law, passed on the 2d day of April, 1821.

This early‑nineteenth‑century directive reads like a maritime courtroom, laying out the health laws that governed every vessel entering the bustling port of Philadelphia. From June to October, captains were obliged to anchor near the Lazaretto, submit their crews and cargo to a physician’s exam, and signal their compliance with a distinctive flag. Ignoring the rules could mean hefty fines or even imprisonment, underscoring how seriously the city guarded against disease in an era of constant overseas trade.

The language is strikingly specific: detailed instructions for ships of different sizes, precise signals for day and night arrivals, and a tiered schedule of fees based on origin and cargo. Listeners will hear the rhythm of legal prose that once dictated the movements of sailors, merchants, and passengers, offering a vivid glimpse into the practicalities of early public‑health enforcement on the high seas.