John Doe, for valuable consideration, agreed to convey to Richard Roe eighty acres of land. He delivered a deed, the material portions of which read:

“I, John Doe, grant and convey to Richard Roe eighty acres of land [land description]: To have and to hold unto Richard Roe, his heirs, and assigns forever.

“I, John Doe, covenant to warrant and defend the premises hereby conveyed against all persons claiming the same or any part thereof by or through me.”

Thereafter, Roe conveyed “all my right, title, and interest” in the eighty acres to Paul Poe. It develops that Doe had no title to the land when he conveyed it to Roe. Subsequently, Doe inherited an undivided one-half interest in the property.

What rights, if any, does Poe have against Doe and Roe?