FLEET OF SHIPS

Looking for the name of the ships that my great grandfather had, he was also a ship captain and went on to be ship inspector. It is my understanding that my great grandfather, Nils Jorgen Larsen, born in 1859 inherited his father's (Lars Jorgen Olsen) ships only to loose them all in the late 1800's . Looks like the ships were sail ships that hauled cargo around the world.