I suppose I'll have to get a locksmith if he doesn't send me the key.
Henlein was a locksmith, who lived in Nuremberg.
In those days a locksmith was like a modern toolmaker capable of fine workmanship in metal.
His family are somewhat grandiloquently spoken of as "cloth merchants ruined by the Revolution," but it seems that at the actual time of his birth his father was a locksmith.
He learnt, as a lad, his father's trade of a locksmith, whilst at the same time he followed the classes of the free school of art.