“According to a 1998 article in the “Daily Mail” (a British newspaper), McCormack’s son claimed that his mother had written the original verse for her hospital’s magazine.
The “Cranky Old Man” version of the poem is said to have been later adapted from McCormack’s version by David Griffith, a U. S. poet.”
Elmer Verigin 
“According to a 1998 article in the “Daily Mail” (a British newspaper), McCormack’s son claimed that his mother had written the original verse for her hospital’s magazine.
The “Cranky Old Man” version of the poem is said to have been later adapted from McCormack’s version by David Griffith, a U. S. poet.”
https://www.agingcare.com/Articles/cranky-old-man-legend-157110.htm