Capo on 5th fret
This is how i figured it out by listening to the song
oh and btw i'm not sure if its "johnny" or "jolly" sailor so go with what sounds right

intro: 
       Am (x02210@1)          G (320003@1)            Am (x02210@1)       GFrom (320003@1)a barque in the harbour I went roaming on shore
            C (x32010@1)    G (320003@1)             C (x32010@1)       GAnd (320003@1)stepped into a pub where I was oft times before
    Am (x02210@1)     G (320003@1)         Am (x02210@1)        GAnd (320003@1)as I was sitting and enjoying my glass
    Am (x02210@1)       G (320003@1)                 Em (022000@1)    AmWho (x02210@1)chanced to walk in but a young Spanish lass

She sat down beside me and kept squeezing my hand
Saying 'Sir you're a stranger not long to this land'
Will you roam, Johnny Sailor, would you roam along with me
To some lonesome spot where nobody can see

[Chorus:]
           C (x32010@1)      G (320003@1)                     Am (x02210@1)          C'Don't (x32010@1)you leave me Johnny Sailor' were the words she did cry
C (x32010@1)        G (320003@1)         C (x32010@1)        GWaving (320003@1)and weeping and wiping her eyes
C (x32010@1)            G (320003@1)          C (x32010@1) GWhen (320003@1)you reach home in your own Newfoundland
      C (x32010@1)          G (320003@1)               C (x32010@1)            AmThink (x02210@1)of the young Spaniard who kept squeezing your hand

[Verse 2:]
I quickly consented with her for to roam
She lived by herself in a neat little home
She was brisk, plump and jolly and her age scare 19
And the name of that maiden I think was Irene

One fine summer's morning our ship, she set sail
And down by the seashore lovely Irene she came
Waving her pocket hankerchief and wiping her eyes
'Don't leave me Johnny Sailor' were the words she did cry

[Chorus]

I'll give you farewell love on a fine summer's breeze
But love don't forget me when you're crossing the sea
And when you are married and enjoying your bride
Think on the young maiden who lay by your side

[Chorus]