NET
21 Going on from there he saw two other brothers, James the son of Zebedee and his brother John, in a boat with their father Zebedee, mending their nets. Then he called them.
Darby
21 And going on thence he saw other two brothers, James the [son] of Zebedee and John his brother, in the ship with Zebedee their father, mending their trawl-nets, and he called them;
KJV
21 And going on from thence, he saw other two brethren, James [the son] of Zebedee, and John his brother, in a ship with Zebedee their father, mending their nets; and he called them.