'In The Desert' in the Bible

So, the child [i.e., John] grew and became strong in [his] spirit and stayed in the desert until the day when he appeared publicly to the Israelites.

[During this time], while Annas and Caiaphas [Note: This man was Annas' son-in-law. See John 18:13] were head priests, God's message came to John [the Immerser], son of Zacharias, [when he was] in the desert [of Judea].

This was according to what is written in the book containing the words of Isaiah, the prophet [Isa. 40:3ff], "The voice of a man who speaks out in the desert [urging people] to make the road for the Lord ready [for Him to travel]; to make a straight pathway for Him [to walk on].