From the Bodleian Library broadside ballad collection, Harding B 11(1453):
Harding B 20(41) is practically identical.
Note the mystery word is "gallows".


RIDING DOWN TO PORTSMOUTH

1. As a sailor was riding along
All in the height of his glory,
As a sailor was riding down,
As you shall hear my story,
He met with a charming young lass,
And he asked her to go along with him,
Some pleasure and pastimes to see,
All in riding down to Portsmouth.

2. She says, "Kind sir, if I go along with you,
I am sure I must be married."
She says, "Kind sir, if I go along with you,
I'm sure I must be carried."
So she went with him straightway,
And slept in his arms till next day,
And she left him all the reckoning to pay,
Riding down to Portsmouth.

3. It was early in the morning
She awoke and found him snoring.
Thus to herself she did say,
"He shall pay for his whoring.
For the money he ain't spent in wine,
The rest of it shall be mine,
And his gold watch too I'll have besides,
In riding down to Portsmouth."

4. Early in the morning he awoke
And found his lady missing.
These words to himself he did say:
"I have paid for my kissing,
For she's robbed me of my gold watch and purse,
And singed me, which is ten times worse.
Sure I must have lain under a curse
In riding down to Portsmouth.

5. "O landlord, tell me what I have to pay
That I may reward you.
"O landlord, tell me what I have to pay
That I may regard you;
And my horse I will leave here in pawn
Till back from sea I do return,
And all such gallows ones I'll shun
In riding down to Portsmouth."