By Henry Herbert Knibbs (1874-1975).
First appearance: The Popular Magazine, June 20, 1920.
Short short story (9 pages).
Online at Comic Book Plus (HERE; select page 48 from the dropdown menu).
"I had been detailed to repair flooring and stairs and watch an Irish setter that seemed to be out of sorts. A rather tame assignment, I thought."
. . . but with traces of crime gradually rising to the surface as time passes, this "rather tame assignment" takes a sinister turn; ultimately, it remains for a mute witness to point out the murderer . . .
~ "Poor Joe":
"No one knew his name. Because of his constant reiteration of poverty and his apparent destitution, he was known as 'Poor Joe'."
". . . the man detailed on the case . . ."
~ "the chief":
"Just forget you ever had anything to do with this office."
~ Spencer, the narrator:
". . . I did feel as though someone had tied a handkerchief over my eyes and told me to
sit still and wait until I found out why I had been blindfolded."
~ Mr. Sperry:
"Do you like dogs?"
~ Miss Stark:
". . . I think she had resented my calling at the front door."
~ John Stark:
"The door closed and a big, swarthy man in corduroys and carrying a shotgun questioned
my presence with a keen glance and a quick shifting of his eyes to the woman."
"She seemed to want to tell me something—or, at least, that is what I thought then. I am positive of it now."
Typo: "It was about to glance round".
- Hercule Poirot also had to deal with a mute witness to unveil a concealed murder (IMDb HERE) and (SPOILERS: Wikipedia HERE).
FictionMags's thumbnail: "Poet and novelist. Born in Clifton, Ontario; died in La Jolla, California."