"I asked them to give me the name of a detective agency."

Any one of them would be a credit to the best detective agency in the country.

I gave the job to a detective agency, but it was not very difficult.

It is considered to be the first known detective agency.

"You talked with some one from the detective agency tonight," he said.

But I have told him of my danger, and he has four men from a detective agency watching the house.

Hey, why don't you and I open a detective agency?

I've had a detective agency prepare a report on you two and your organization for me.

With a new and important addition from the Swiss detective agency.

But he might have gone to some private detective agency and commissioned them to find me.