I am not sure if this is
https://www.wikitree.com/wiki/Grierson-139. If it is, please could you add a link to the profile to your question. The profile is effectively unsourced, and orphaned, so, if this is the person, you could adopt it and improve it.
Any other information you are able to add about Walter William Grierson might increase the likelihood of a WikiTree member being able to respond.
I am adding some tags to your question. These may help attract attention.