Hi Stan
I've been following your leads and I have now located pretty much exactly where Edger Terrace was. The terrace was demolished over a number of years to accomodate the railway development. It was located at the corner of Grove Hill Road and the High Street (opposite Hoopers). There is now an opening to a car park on a slope leading to where a new tunnel (to accomodate the southward extension of the line) was built.
In 1841 we find an Edger House and 11 houses in Edger Terrace. By 1851 numbers 7 to 11 had disappeared and the census shows that numbers 1 and 3 were empty with only 2, 4, 5, and 6 occupied. Edger House also had gone. By 1861 number 6 had also disappeared and only numbers 1 to 5 were occupied. By 1871 none were left.
The gradual disappearance of houses in Edger Terrace seems to correspond with the development of the railway in Tunbridge Wells:
August 1843 SE Rail started buying land between Tonbridge and Robertsbridge
20/09/1845 Jackwood Springs (in what is now Good Station Road) opened
25/11/1846 Tunbridge Wells Central opened
March 1848 Grove Tunnel finished
01/09/1851 The line to Robertsbridge opened
01/02/1852 The line to Hastings opened
Thanks to all for your help