# he learned
"Pilate found out"
# he was under Herod's authority
The passage does not state the implied fact that Herod was the ruler of Galilee. Alternate translation: "Jesus was under the authority of Herod because Herod ruled over Galilee" (See: [[rc://en/ta/man/translate/figs-explicit]])
# he sent
"Pilate sent"
# who himself
This refers to Herod.
# in those days
"at that time"