alanmurp on Family Tree Circles

Hello everyone,I'm new to this site, hoping that someone will be able to help me. Whether it is my mind hitting a wall or whatever,I am having severe difficulties in finding further details about my grandfather.
Name: Adam Murphy, born appx 1899(+/-1 yr)
Found his marriage cert for 1919 to an Ellen Morrison in Glasgow
His parents were John Murphy & Margaret (or may be Ann) Ashcroft
I just seem unable to find his birth details, can anyone help me?

Many thanks