Ranald's heirs (Clan Ranald) disputed and fought against the charter. Following Hugh of Sleat's death, in 1498, and for reasons that are not remotely clear, his son John of Sleat immediately resigned, transferring all authority to the king. By this point, John of Ross's conspiratorial ambition had caused the Lordship of the Isles to be forfeited, but in 1501, his heir, Black Donald, launched an insurrection seeking to restore it. Ranald Bane, leader of Clan Ranald, was one of the few MacDonald-descended clan leaders to refuse to support Donald, so in 1505 (shortly before Donald was defeated) Ranald Bane was given the Lairdship of Arisaig and Eigg, as a reward.