Markus 1:19

1:19 Going on a little farther, he saw James, the son of Zebedee, and John his brother in their ¹  boat mending nets.

Markus 4:27

4:27 He goes to sleep and gets up, night and day, and the seed sprouts and grows, though he does not know how.

[1:19]  ¹ tn Or “a boat.” The phrase ἐν τῷ πλοίῳ (en tw ploiw) can either refer to a generic boat, some boat (as it seems to do in Matt 4:21); or it can refer to “their” boat, implying possession. Mark assumes a certain preunderstanding on the part of his readers about the first four disciples and hence the translation “their boat” is justified (cf. also v. 20 in which the “hired men” indicates that Zebedee’s family owned the boats).