The post will not print out the lyrics.
I attempted to listen to the two midi files at this forum
for the tune.
Because I'm at a public computer,
I had too much trouble hearing Barbara's midi version,
and I could neither modify the volume nor use earbuds/headphones.

So I don't know about Barbara's version of the song melody;
if I can use headphones in the future,
then I can hear that file eventually.

What I have checked is this:
That Yale University Glee Club collection from 1903,
referenced in the post before this one,
is a vocal-piano musical score.
The lyrics are embedded in the score,
not printed out separately.

So when you pull up that digital copy online
and look at "The Whizz-Fish,"
both words and music are available to you.
And this is what the score shows:

The verses, outside of that chorus,
are a single melodic line.
The accompaniment to that melody for the verses
is written out for piano in the grand-staff,
treble clef and bass clef;
it is the sort of simple oom-pah accompaniment
that mimics a guitar,
and most likely can be actually played on the guitar.

When you get to the chorus, the accompaniment drops out completely,
and what appears is
a four-part (TTBB) men's chorus a cappella,
in which the melody seems to be sung by
the lower tenor line,
while the higher tenor line has a barbershop descant.

Now, how does Joe Offer's transcription from SongFest,
converted to midi file,
compare with the Glee Club Collection melody?

As follows:
The midi melody transcribed by Joe Offer
is actually the part of the melody,
in the Yale University Glee Club music,
that shows up with these words:

Just every nineteen minutes he jerks it thro' the air,
With a South American whizz-fish a-flopping helpless there ...

and in the later verse it shows up with these words:

The tree stretch'd like a garter, a dozen miles or so,
Till the fish let go, and the monkey flew like an arrow from a bow ...


In the Glee Club music score,
the beginning of each of the two verses --
the first sixteen bars, pretty much --
the words are set
to a melody that is DIFFERENT
from what is in Joe Offer's SongFest transcription.

The melody in the chorus, however,
is recognizably the same.

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https://books.google.com/books?id=zDEzAQAAMAAJ&pg=PA66#v=onepage&q&f=false

https://www.youtube.com/watch?v=nxb4KdP79NA