[1] In March 1583 an envoy in London collecting money for the church in Geneva, Jean Maillet, met Lesieur and they discussed efforts to raise a ransom for the English diplomat Daniel Rogers, who had been captured by Maarten Schenck van Nydeggen.
[5] In 1602 he was appointed as assistant to an embassy sent to Bremen to meet Danish ambassadors including Manderup Parsberg and Jonas Charisius to discuss fishing rights.
[9] On 17 August he wrote from Neukloster near Wismar to Robert Cecil detailing his movements and meetings, following his audience with Charles I, Duke of Mecklenburg.
[10] In March 1608 he was preparing to go to Italy when one of his companions and cousins, the eldest son of Sir Richard Norton, was challenged to a duel by Henry Clare (a follower of the Earl of Montgomery) for wrongs done to his sister.
[11] The Governor of Vlissengen, John Throckmorton heard in October 1612 that Lesieur had a "sour" audience with the Emperor, and a better reception from Archduke Maximilian, and had gone to the Duke of Brunswick to offer condolences on the death of his father.