"Ah!" said he, "they are on the right track at last.

That tool must certainly have been dropped by Salvat.

He worked at Grandidier's before he came to me for a few days.
And from Grandidier they will learn all that they need to know in order to follow the scent." Pierre then remembered that he had heard the Grandidier factory mentioned at Montmartre.

Guillaume's eldest son, Thomas, had served his apprenticeship there, and even worked there occasionally nowadays.
"You told me," resumed Guillaume, "that during my absence Thomas intended to go back to the factory.

It's in connection with a new motor which he's planning, and has almost hit upon.