This might be clear already, but this "Cape Horn version" doesn't represent a song that was ever sung as such. Hugill has, I think, just thrown together miscellaneous verses, some that seem to pertain to a "Cape Horn - Gold Rush" theme and others that are floaters. Hugill may have heard someone sing several of these verses together in a single performance, but it's most likely he has created a composite based on verses he heard (or READ) from various sources. He may even have put some of his own verses in at the very time of writing.

It only appears as a "version" because of how he has grouped it within other phenomena. On one side: Evidently he noticed that more than one (we hope) person who sang "Sacramento" started off with the "As I was walking down the strand..." idea (Davis and Tozer was one source for this), and then would continue that bawdy theme in a narrative fashion. On the other side: He notes that some people basically sang the words to "De Camptown Ladies." In between these is just "Sacramento," a chanty that has no set lyrics (aside from the chorus) and which can include ideas from wherever. Hugill decided, I think, that since the California Gold Rush was contemporary, he'd "file" verses on that theme under the heading of a "version." I'm really skeptical of calling any thing a "version" in chanties.

The verses offered in various sources tend to be common or nondescript lines or floaters, e.g.

Oh the Shanghai race is ten miles long
The Shanghai race is ten miles long

In the Black Ball Line I served my time, ?
In the Black Ball Line I served my time,

We're bound for California I heard the old man say;
We're bound for California this very good day.

New York City is on fire
New York City is on fire

A bully ship and a bully crew,
A bully mate, and a captain, too,

Went to the river and I couldn't get across

As I was a walking down Liverpool street

As I was out upon the road one day,
Says I, “Old man, your horse is lame,” (floater from "Poor Old Man")

Oh, heave, my lads, oh heave and sing,
Oh, heave and make them oak sticks spring,

My inclination would just be to say "This is what Hugill said," rather than to use what Hugill said to state something definitive about the songs.