It is produced according to the original recipe kept secret and a more than 125 year old method.

It was proof that Stark had some secret method of reaching the island from the pit beneath the boulder.

Not only that; he could gain important information of the Wu-Fan's secret methods.

They promised at once to set to work their secret methods of getting information.

Open measures failed; secret methods may follow.

It was obvious that the killer had some secret method of entering and leaving the dining booth by the inner wall.

He had discovered a new and secret method of transformations that was unknown to any other Sorcerer.

There is a secret method, known only to you, that allows you to tell the true Alvarado from the false.

Is there any rule regulating how they are put in order, or some secret method of getting your question to the top of the list?

In some instances, for example early ballpoint pens, to provide a "secret" method of disassembly.