In a document of 1468 the road is called "Graysynlane, otherwise Portpole Lane". Today's Portpool Lane, which leads off Gray's Inn Road to the east, is a separate road which is not mentioned before 1641.
According to a record from 1468, the road was known as "Graysynlane, otherwise Portpole Lane." Today's Portpool Lane, which extends from Gray's Inn Road in the eastern direction, is its own separate road that wasn't referenced until 1641.