NEWPORT — Oracle founder and multibillionaire Larry Ellison has apparently purchased the Seacliff home at 562 Bellevue Ave. for $11 million, thus giving him ownership of all four properties between Rosecliff and Marble House, two Preservation Society of Newport County mansions. Ellison’s central property here is the Astors’ Beechwood mansion at 580 Bellevue Ave., on which he has spent more than $100 million to renovate it for a planned Beechwood Art [...]