Astronomical Observations made in the Austrian Netherlands in 1772 and 1773 by Nathanael Pigott, Esquire F. R. S. Foreign Member of the Academies of Brussels and Caen. In a Letter to the Reverend Nevil Maskelyne, Astronomer Royal, F. R. S. Philosophical Transactions - volume 66 - Page 182

astronomical observations made there in the years 1772 and 1773 ; his astronomical observations made in the Austrian Netherlands, in the years 1772 and 1773 ; Instruments used, and elements employed in the calculations ; made in the Austrian Netherlands, in the years 1772 and 1773