Which preposition to use with brockman

in Occurrences 2%

Hann and Brockman in the North-West.

at Occurrences 1%

Cockatoos and other game were plentiful, sixteen of the former being killed by Mr. Brockman at one shot; they were white, with orange-tinted feathers in the crest, similar to those on the Murchison and Gascoyne Rivers.

to Occurrences 1%

Permission had been granted him by Brockman to recross the river on some needful errands; and, having once proved the extreme sensitiveness, not to say irritability, of those in temporary command, he was now resolved to give as little éclat as possible to certain superior aspects of his own sanctity.

Which preposition to use with  brockman