WorldCat.org says that the University of Oxford and the British Library have sheet music described thus:

I COULD'NT [sic]
Author: Arthur Lloyd; H G Banks
Publisher: London : Hopwood & Crew, [1887]
Document Type: Musical Score
OCLC Number: 50229472
Notes: Song for voice and piano.
First line: I went to see some dear old pals.
First line of chorus: I couldn't.
Pictorial t.p. (col.): H.G. Banks, lith.
Portrait on t.p.: Arthur Lloyd. Words printed separately on p. 5.
Responsibility: written, composed and sung by Arthur Lloyd.

I found other apparent music-hall songs titled
I COULDN'T, COULD I? - words by S. H. Emmens, music by Joseph Leopold Röckel
I COULDN'T GET IN - words by J. P. Harrington, music by Orlando Powell
Etc.