Which preposition to use with jourdan

at Occurrences 2%

Perceiving this vast body of police, with Superintendent JOURDAN at its head, advancing with measured tread upon them, the Count sheathed his sword and Mr. P. shut up his deadly weapon.

of Occurrences 1%

Lord Stuart seems to have behaved prudently in merely acknowledging the receipt of the communication from Marshal Jourdan of his being appointed foreign secretary.

Which preposition to use with  jourdan