It might be far from perfect, but it was sufficient for me.
It would be child's play to find Kaffar there.
"That will do," I said to the professor.

"I'll start at once.

Thank you so much." "Ah, that will do, will it ?" he said, with a smile.

"Then I'll wake up this man." Simon woke up as usual, rubbing his eyes, and asked whether any good had been done.
"Everything's been done," cried I."Come, professor, allow me to write you a cheque.

How much shall it be ?" "Not a penny until your work is accomplished," replied the little man, with dignity.
"That is not fair," I said.