I have snooped. I find that in my translation of `L`Armee du Duche de Varsovie de 1807 a 1815` by Jan Chelminski and A Malibran, Paris 1913, Copy Nr 38 of 1,000, Berlin, Lipperheide Sammlung; I wrote: `The 7th Lancers (ex 1st Lancers of the Vistula (Colonel Klicki) was in IV Corps, attached to the Italian Royal Guard.`