This is the poem that McGarrett recites at the end of "A Bird in Hand…"

Gold, gold, gold, gold
Bright and yellow, hard and cold
Molten, graven, hammered and rolled
Heavy to get, light to hold
Hoarded, bartered, bought and sold
Stolen, borrowed, squandered, doled
Spurned by the young, hugged by the old
The price of many a crime untold
Judges and senates have been bought for gold
Esteem and love were never to be sold
What is fame? An empty bubble
What is gold but shining trouble?

This poem is a mishmash of three different poems. But Google is our friend in investigating this!

The first seven lines of McGarrett's poem are from Gold! by Thomas Hood (1799-1845), an English poet, author and humorist.

Gold! Gold! Gold! Gold!  [McGarrett: Gold, gold, gold, gold – as per the subtitles]
Bright and yellow, hard and cold
Molten, graven, hammered and rolled,
Heavy to get and light to hold,  [McGarrett: Heavy to get, light to hold]
Hoarded, bartered, bought and sold,
Stolen, borrowed, squandered, doled,
Spurned by young, but hung by old  [McGarrett: Spurned by the young, hugged by the old ]
To the verge of a church yard mold;  [This line is cut out.]
Price of many a crime untold.  [McGarrett: The price of many a crime untold]

McGarrett's borrowing from Hood's poem ends here; it goes on for another seven lines.

The next lines in McGarrett's poem are

Judges and senates have been bought for gold
Esteem and love were never to be sold

These are from An Essay on Man, EPISTLE IV, by Alexander Pope (1688-1744), virtually the same.

The last two lines are by James Grainger (1721–1766) a Scottish poet, from his Ode to Solitude, with minor changes, including the second line.

What is fame? an empty bubble;
Gold? A transient shining trouble.

McGarrett's:

What is fame? An empty bubble
What is gold but shining trouble?

Aren't you excited to know this! ☺