Pic 1 - 1 Jan 1884: Peshawar-LHR-GZB-HWH "Through Carriage" (HWH-DLI-LHR was "Through Ticket" not "Through Coach" as early as 1881 ex GZB) click here
1/2 Delhi Mail tow through Coach which bifurcate ex DLI. 1 Dec 1901: Oudh & Rohilkhand introduced MGS-LKO-SRE Punjab Mail (connecting 1/2 Delhi Mail at MGS & 1/2 Bombay/Punjab Mail at SRE). 1/2 Delhi Mail MGS-HWH Portion was termed 1/2 Punjab Mail. click here
1933 Blast ex Mokameh let 1/2 Delhi Mail divert via GC. 1934: 5/6 EIR HWH-MGS Mail (on demand) started to connect MGS-SRE 7/8 Punjab Mail...
more... click herePic 2 - 1933: 2 DN Punjab Mail via PNBE, 1925: 8 DN Punjab Mail Via LKO.
Trivia: 7/8 was number assigned to Toofan Exp in 1926!!