Heard of E & W Leathem of Belfast ?

Does anyone have any information on E & W Leathem of Belfast? I have what appears to be a 1-key piccolo with E & W Leathem followed by Belfast below the name. I haven’t even been able to find any info about 1-key piccolos. It appears to be well made and is made of African blackwood or cocus (that has oxidized).
Thanks for any help.
Cheers:)

I’ve often seen this stamp on small fifes and band flutes. I suspect that Leatham’s were a provider of instruments rather than makers. Bought them in from somewhere ( London?) and stamped then with their own name.
They’re not listed in Langwill.
All the Best
Hammy