You're not finding it because it's not Greg Brown, it's John Prine.

The Bottomless Lake
(John Prine)

Intro (Capo on 3rd Fret):
[C] [G] [D] [G]
[C] [G] [D] [G]

[G]Here's the story of a man and his family
And a b[D]ig trip that they to[G]ok
Well, I heard all about in a restaurant
And I r[A]ead it in a history bo[D]ok
They r[C]ented a car at the E[G]rie Canal
But the car didn't have no br[C]ake
Said Ma to Pa "My G[G]od this car"
"Is gonna f[D]all into the Bottomless L[G]ake"
[C] [G] [D] [G]

[G]Well, Mama turned to Daddy with a pale face
Said "I've d[D]one something horribly wr[G]ong"
"Well, the waters still runnin' in the bathtub"
And I th[A]ink I left the kitchen light [D]on"
Then I he[C]ard a crash the c[G]ar when splash
And the compass rolled around and ar[C]ound
Oh, for Heaven's Sake! We f[G]ell in a lake
And I th[D]ink we're all gonna dr[G]own

Chorus:
We are fa[D]lling down
Down to the bottom of a h[G]ole in the ground
Smoke 'em if you got 'em
I'[C]m so scared I can ha[G]rdly breathe
I may n[D]ever see my sweatheart ag[G]ain
[C]Play once after first verse [G] [D] [G]
[C] [G] [D] [G]

[G]There was plenty of food in the backseat
And the wi[D]ndows were rolled up ti[G]ght
So we all nibbled on a chicken leg
Told st[A]ories 'way thru' the n[D]ight
We[C]ll, Pa told one that he t[G]old before
And the baby got a bellya[C]che
Said Ma to Pa "My G[G]od this car"
"Falling d[D]own a Bottomless L[G]ake"

Repeat Chorus:

[G]Poppa played the music on the radio
M[D]ama rocked the baby to sl[G]eep
He said he would've taken the other road
But he di[A]dn't think the lake was that d[D]eep
Well, if the f[C]erry been there at the [G]end of the pier
We'd be half way to Uncle Ja[C]ke's
Instead of looking at fish out the w[G]indow I wish
We'd hit the bo[D]ttom of the Bottomless L[G]ake
'Stead of lo[C]oking at fish out the wi[G]ndow I wish
We'd hit the b[D]ottom of the Bottomless L[G]ake

Repeat Chorus:

[G]So if you're ever goin' on a big trip
Ya be[D]tter be careful out th[G]ere
Start everything on you good foot
And [A]wear clean u[D]nderwear
T[C]ake along a Bible in the ba[G]ckseat
Read of David and Solo[C]mon
For if you make a mistake in the Bottomless L[G]ake
You may ne[D]ver see your sweetheart ag[G]ain
If you sh[C]ould make a mistake in the Bot[G]tomless Lake
You may ne[D]ver see your sweetheart a[G]gain
If you sh[C]ould make a mistake in the Bot[G]tomless Lake
You may n[D]ever see your sweetheart ag[G]ain
[C] [G] [D] [G]
[C] [G] [D] [G] [D] [G]