Which preposition to use with lecher

by Occurrences 1%

Touching the money of Ormuz, they bargaine in marchandize at so many leches by the barre, which lech is 100 Asaries, and maketh larines 100 and a halfe, which maketh pardaos 38, and larines one halfe, at larines 5 by the pardao.

in Occurrences 1%

Saxony was already disposed to abandon him, Denmark viewed his success with alarm and jealousy; and even France, the firmest and most potent of his allies, terrified at the rapid growth of his power and the imperious tone which he assumed, looked around for foreign alliances at the very moment he passed the Lech in order to check the progress of the Goths and restore to Europe the balance of power.

Which preposition to use with  lecher