Grandpa was a Painter, Not a Fighter / by VH McKenzie

My mother mailed me this lovely pen and ink drawing, made by her father during his military service in World War 1. My grandfather, Robert Birrell, was a Scotsman who served in his Majesty's armed forces. 

You can see his signature and notation of the location here --

But this is a bit of a mystery -- he clearly had a sense of humor but I'm not quite sure what this means -  Hotel  Dal Blai?   
Any ideas? 
Please let me know........