Whakaotihia te rerenga e whai ake nei: I te tau 1801, ka uru a Camille Alphonse Trezel hei kaihoahoa ki te tari o te pakanga, a i te tau 1803 ka eke ki te taumata o te rangatira i roto i te tinana o nga kaipūkaha topographic. I tukuna ia i te tau 1804 ki te ope taua o Holland, i whakatairangahia ia i te tau e whai ake nei ki te kaiawhina miihini matawhenua. I muri i te
I te pakanga Polish, i tohua ia hei kaitohutohu mo te General Gardane i te karere French ki Persia i te tau 1807-1808, katahi ka awhina ia ki a General Armand Charles Guilleminot i tana hokinga mai i te tau 1809. Ko ia te hekeretari o te Komiti mo te Whakaaetanga o Illyria, i whakatairangahia ki te rangatira (1810), ka whakawhiti ki te ope Spanish. I whakahokia mai ki Tiamana i te mutunga o te tau 1811, i mahi ia i te tari tirotiro a Hanseatic, i te pakanga ki Roma, ka noho hei rangatira rangatira (1813), Kaiwhakahaere o te Tari 13th, ka mahi ki te tiaki i Mainz.