Letter to Lord Cathcart, President of the Board of Police in Scotland; concerning the recovery of persons drowned, and seemingly dead. By William Cullen, M.D. First Physician to His Majesty, and Professor of the Practice of Physic in the University of Edinburgh. To which is added, an extract from the journals of the Board of Police, containing a paper presented by Lord Cathcart, to that honourable board, on the same subject. 1776