“ Beginning at the intersection of State Road Number 78, which is also known as Atlantic Boulevard, and the abandoned Florida East Coast Railroad Right of Way, Mayport Branch in Duval County, Florida; thence running Easterly along the abandoned Florida East Coast Railroad Right of Way, Mayport Branch, to Spring Glen; thence continuing Easterly along the abandoned Florida East Coast Railroad Right of Way, Mayport Branch, crossing State Road Number 78; thence continuing Easterly through Jacksonville Beach, in Duval County, into the Ocean Beach of the Atlantic Ocean. ”