Was Abinadi sitting out in the wilderness by himself for two years? That is a long time to spend alone out with the jaguars and the boa constrictors. The only other known Nephite settlement at this time was in Zarahemla. If Abinadi was an older prophet and had come back with the original settlers who re-inherited the land of Nephi, he would have known at least approximately where the land of Zarahemla was. I suspect that Abinadi went back to Zarahemla for spiritual and textual reinforcements. This could account for some of the similarities in language between words found in Mosiah 3 (King Benjamin) and the end of Mosiah 15 (Abinadi), although the two of them could have drawn independently on Nephite doctrines and teachings. But more than that, it seems quite possible that Abinadi went back to Zarahemla to consult the Law of Moses and the words of Isaiah recorded on the plates of brass. When he returned to the land of Nephi, he was certainly well prepared with a knowledge of the law and commandments. King Benjamin and Abinadi were both prophets of the Lord. They could well have worked and consulted together. We usually think of Abinadi as a solo operator, but he may have had connections with other prophets. He may have gone to Benjamin as an established royal priesthood leader to seek guidance from the Lord and to gather wisdom by memorizing the scriptures.