Edwards & Sons, musical string makers

[Kirrie]

I am interested in a company called Charles Edwards and Sons, musical string makers & sausage skin manufacturers & glaziers' diamond makers.  Edwards were to be found at 41 Cowcross Street, E.C.?; Tileyard Road (where my several of my ancestors worked); York Road N.? and Foreign Cattle Market at Depford, S.E.?
I believe they were a very old firm.
Can anyone help with the research?
Thanks,
Sue

[sillgen]

1846 Post Office London Directory
Edwards Chas.& Son, music string ma. 20 Sharps all. Cow cross
That is exactly as written.  I assume all. is alley.
Andrea

[Kirrie]

Thanks Andrea, another piece of the jig-saw!
Sue