Robert bought at different times small quantities of quicksilver.
The men in the machine shops were curious to know what he did with it.
But they could not find out.
For this reason they called him "Quicksilver Bob."
Robert was interested in guns.
Sometimes he would tell the workmen how to improve them.
The men liked him so well that they were always willing to try whatever he advised.
Robert was fond of fishing.
One of the workmen often went fishing with his father.
This man sometimes took Robert.