sentences:  The Paul Le Marinel expedition only managed to obtain a vaguely worded letter (the Le Marinel letter) from Msiri agreeing to Free State agents having a presence in Katanga, but nothing more.This expedition was hampered by an accident when the gunpowder it was bringing for Msiri blew up, killing several men and damaging some of the other gifts being brought to sweeten the deal.A Belgian officer from the expedition, Legat, stayed behind with a group of askaris at a boma on the Lufoi River about 40 km from Bunkeya to keep an eye on Msiri.