Which preposition to use with cauteries

about Occurrences 1%

First of all, he performed daring surgery and cautery about the very heart of the Court.

than Occurrences 1%

In securing this more reliance can be placed on the actual cautery than on any other, whether liquid or solid: it is more under control in application, more decisive in effect, and its results can be anticipated with a far greater certainty.

Which preposition to use with  cauteries