[3] From 1764 he served in the Polish diplomatic service, first under Familia, and soon under king Stanisław August Poniatowski.
In the 1780s he wrote a project known as Vox in deserto, which he presented to king Poniatowski at a time he was considering joining Russia in its war against Ottomans, and which drew plans for a conquest of Moldava and surrounding territories.
He served under Russian diplomats Jacob Sievers and Yakov Bulgakov and was active in the background of the Grodno Sejm of 1793.
During the unrest of 28 June 1794 he was dragged from the jail and lynched (most sources specify he was publicly hanged[6]), alongside some other unpopular individuals seen as supporters of the Targowica Confederation and traitors to the Polish cause.
[7] The hanged individuals, in addition to Boscamp-Lasopolski, included bishop Ignacy Jakub Massalski and prince Antoni Stanisław Czetwertyński-Światopełk.