Marshall traction boiler drawing

[STERVAN]

Hello TT folk

I'm looking for a boiler drawing or boiler drawing numbers showing the pressed star, camber top crowned firebox ideally 2' 10" long but anything close will be useful.

Also any literature on Marshalls pressed firebox crowns I've heard there is a advertisement where Marshalls advertised to replacement boxes with the pressing would like to get a copy of this.

I'm in touch with the Gainsbourough Heritage Center and Marshall 8nhp on here who as always has been very helpful.

Many thanks Matt