When by a most ingenious method I have settled my accounts?

In fact, all is clear except the details of your 'ingenious method'.

There is apparently no record of any message having been returned to the town by this ingenious method.

Even now it was dangerous, but Minstrel had devised an ingenious method.

Prokop had an ingenious method of communicating with his agents.

It's no wonder, then, that we've developed ingenious methods for creating, manipulating and capturing light.

Considerable effort has gone into evaluating the risks and developing ingenious methods to reduce them.

Benjamin Franklin came up with several simple but ingenious methods to slow down counterfeiters.

Often ingenious methods were developed for administering the weapons.

Google has pioneered an ingenious method of putting ads right where they need to be.