Good Morning.
I've tried Ancestry and they have transcripts of the 1901 census.
Burns St ,Glasgow St George in the Fields
Model Lodging House
James Robertson 50 lodger born Beechen ,Forfarshire.
Han Dresser
There are 50 lodgers ,all men so I won't list them all.
FindMyPast says he is a hair dresser and married.
Just checking he's not this chap buried at Barry Angus
James L Robertson age 50 buried 19.12.1900 Died Chillan Chile
same grave David L Robertson died at Moffat 4.5.1886 age 34.
It doesn't look like him.
The bloke in Glasgow looks a lot more like him.
There is a death
Robertson James 77 mmn Rodgers 1928 Pollokshields on Scots People
That looks like him.
Maybe

Ciderdrinker