The North & South Carolina and Georgia almanack, for the year of our Lord 1786 : ... Precisely adapted to the horizon and meridian of Charleston: lat. 31 deg. 30 min. north. Longitude 79 deg. west of the meridian of the Royal Observatory in Greenwich: but may serve without sensible error for any of the adjoining states. ... / - Bickerstaff, Isaac. (Printed for A. Timothy, printer to the state,, 1785)