The crest and inscription on the arch are obscured by the vegetation - see TQ3295 : Clarendon Arch, Bush Hill, London N21 (photographed by John Salmon). The crest is Myddelton's. The inscription on the arch says "This arch was rebuilt in the year 1682. Honerable Henry Earle of Clarendon Being Gov." .
The arch and the tunnel are Grade II listed Link .