This log book (around 200 pages) pertains to the voyages of the bark Neptune from Philadelphia, Pennsylvania, to the Isle of France (present-day Mauritius) and back to Philadelphia from 1789-1790 and voyages of the schooner Federal between Pennsylvania and the Caribbean in 1791. The log entries are written in a pre-printed The Seamen's Journal Book (London, 1785), with sections for each day's measurements and remarks.
The log entries from the voyages of the Neptune (which comprise the bulk of the volume) and the Federal are typically notes on the wind direction, ships' courses, and ships' positions. Additional prose remarks concern weather conditions, the sighting of land, encounters with other ships, and anchorage at a port or harbor. The log has gaps during the Neptune 's stay at the Isle of France and during the Federal 's time in Caribbean and United States ports.
The first page of the volume, preceding the printed title page, has calculations involving an epact. The book's final pages contain entries from one of the Federal 's voyages and additional notes about the Neptune 's time at the Isle of France in December 1789 (particularly regarding a thunderstorm). A sheet of paper laid into the book contains notes about an unknown vessel's anchorage at Saint Helena in May and December 1783.