John Chisholm is listed in the Glasgow classified directory as a bagpipe maker in 1901. 

The listing changed to Chisholm and Hunter in 1912. 

Hunter appeared earlier as dealing in antiques and musical instruments and many other items.  It appears that the bagpipe business continued until about 1949. 

According to one source who joined the Royal Scots as a band boy at age 15, "old time pipers played Chisholm pipes in the regiment band as they were the best."

I spent years searching for information on John Chisholm.  Several months ago I purchased a bagpipe thinking that it was made by James Robertson.  When it arrived the  similarities were apparent, but it also departed considerably from Robertson bagpipes.  I matched it up in pictures and measurements with an instrument that had been presented to me as "Chisholm".  Following up on a lead, I was able to confirm that James Robertson indeed made bagpipes for Chisholm.  This information came from George Kilgour through a very reliable source.  George was, of course, a Master Turner inside the James Robertson bagpipe workshop.
Makers of Old Bagpipe Place Home
To my eye, the set to the left lines up with the set above.  I believe both to have come our of Robertson's shop for Chisholm.  The full ivory set to the right has similar characteristics as will.  The silver is stamped JC for John Chisholm however was found on a Henderson bagpipe. 

Interestingly, Jame's Robertson's music book "Master Method for Highland Bagpipe" published in 1953 has a jig named Walking the Floor written by J. Chisholm.
Museum The Bagpipe Place