The claim — likely referring to Sir Walter Raleigh's 1584 patent or the London Company's 1606 charter (Virginia, 34°–41° N) — failed because:
Spain had already explored, claimed, and begun settling the southeastern region (La Florida, 1513–1565: Ponce de León, Narváez, de Soto, Menéndez de Avilés — St. Augustine 1565, Santa Elena 1566).
1606 Virginia Charter deliberately set northern boundary at 41° N (Long Island Sound) — north of Spanish Florida (31° N). Jamestown (1607) at 37° N — a calculated gap.
The "claim" failed because effective occupation trumps paper claims — and Spain was there first, continuously.