The setting of the story has changed, Jesus and his brothers are now at the festival.
# when his brothers had gone up to the festival
These "brothers" were the younger brothers of Jesus.
# he also went up
Jerusalem is at a higher elevation than Galilee where Jesus and his brothers were previously.
# not publicly but in secret
These two phrases mean the same thing. The idea is repeated for emphasis. AT: "very secretly" (See: [[rc://en/ta/man/translate/figs-doublet]])
# The Jews were looking for him
Here the word "Jews"is a synecdoche for "the Jewish leaders." The word "him" refers to Jesus. AT: "The Jewish leaders were looking for Jesus" (See: [[rc://en/ta/man/translate/figs-synecdoche]])