TY - JOUR T1 - Extracts of Two Letters from the Rev. Edward Gregory, M. A. Rector of Langar, Nottinghamshire, to the Rev. Nevil Maskelyne, D. D. F. R. S. Astronomer Royal; Containing an Account of the Discovery of a Comet, with Observations Thereon JF - Philosophical Transactions of the Royal Society of London (1776-1886) VL - 83 SP - 50 EP - 54 PY - 1793/01/01/ UR - http://dx.doi.org/10.1098/rstl.1793.0007 M3 - doi:10.1098/rstl.1793.0007 AU - Gregory, E. ER -