Possible Clues:

• Fabled lost realm
• Books I found among maps showing continent
• Objectors adopting URL, say, of Fantasy Island
• Legendary island that sank beneath the sea
• Lost land last carved up without objector
• Book about knight and time on one idyllic island?
• Mythical lost land
• Mythical continent
• Mythical island that sank into the sea
• Connolly described some, in a work of some promise