Here's how I do it, in D. Chords are shown just before the syllable they fall on.
I suspect its the E-A-F#-B 7ths that puzzled our guest poster.
W-O

ST. JOHN'S WALTZ (Ron Hynes)

Oh the (D)harbour (A7)lights are (D)gleaming
And the (G)evenings still and (D)dark
And the (D)seagulls are all (Bm)dreaming
Seagull (E)dreams on Amherst (A7)Rock
And the (D)mist is (A7)slowly (D)drifting
As the (G)storefront lights go (Bm)dim
And the (D)moon is gently (Bm)liftin
As the (E7)last ships comin (A7)in

(Refrain) Every (G)sailor's got a story
Some are (D)true, and some are (G)false
But they're (E7)always (A7)wrecked, and they're (F#7)up on the (B7)deck
(E7)Dancin' the (A7)St John's (D)Waltz.

(Turnaround: E / / A7 // F#7 // B7 // E7 // A7 // D // D)

Oh we've (D)had our (A7)share of (D)history, Seen (G)nations come and (D)go.
Seen (D)battles rage o'er (Bm)land and stage Four (E7)hundred years or (A7)more
For (D)glory (A7)or for (D)freedom Or for (G)country or for (Bm)King
Or for (D)money or fame, but there (Bm)are no names
On the (E7)graves where men lie (A7)sleeping

All the (G)nine to fives survive the day With a (D)sigh and a dose of (G)salts
And they're (E)parkin their (A7)cars, and (F#7)packin' the (B7)bars
And (E7)dancing the (A7)St John's (D)Waltz.

Oh my (D)heart is (A7)on the (D)highway And I'm (G)sold on goin to (D)sea
All the (D)planes fill the (Bm)skyway All the (E)trains run swift and (A7)free
Leave the (D)wayward (A7)free to (D)wander Leave the (G)restless free to (Bm)roam
If it's (D)rocks in the bay, if it's (Bm)old cliche You will (E7)find your (A7)way back home
But don't (G)question or enquire What's been (D)gained, what's been (G)lost
In a (E)world of ro(A7)mance don't miss (F#7)out on the (B7)chance
To be (E7)dancin' the (A7)St John's (D)Waltz.

-Ron Hynes