I think I need to remove the front of the boiler.
I have to undo the prior "fixing". Someone rather securely placed a brass tube instead of a glass one.
Was glass tube rare at some time over the last 100 years? It's not difficult to reseal the glass.
Originally the boiler appears to be attached by the bottom via tabs. The straps that were on this engine were crinkly and looked sloppy. So easier to go back to the tabs. I don't like the idea of de-soldering tabs for disassembly, so I think I'll solder on tabs once and then use a bolt to secure to the firebox.