I have just come into possession of a small booklet that was apparently a patent medicine advertisement. The front cover, and possibly some pages, are missing. There is no publisher's information or copyright.
The back cover, which is present, has a picture of a rather large "factory looking" building bearing the sign of "C.F. Simmons and Company – Laboratory," which I gather from what's inside was in St. Louis, MO.
The obverse of the first leaf present has calendars for the month of January, 1866 and 1867. Other pages do show the complete 12 months for both years.
The front of the first leaf carries what must be presumed to be an advertisement, rather than a scientific report, proclaiming:

Dr. M. A. Simmons LIVER MEDICINE,
CURES
INDIGESTION, COLIC, CONSTIPATION, LANGUOR,. JAUNDICE, SLEEPLESSNESS, SOUR STOMACH, SICK HEADACHE, NERVOUS HEADACHE, LOSS OF APPETITE, MALARIAL FEVER, BAD TASTE IN MOUTH, BILIOUSNESS, DROWSINESS, DYSPEPS1A, D1ZZINESS, RESTLESSNESS, HEARTBURN, NERVOUSNESS, DYSENTERY, FOUL BREATH, BILIOUS FEVER, LOW SPIRITS, TORPID LIVER, WEIGHT IN STOMACH AFTER EATING.
IT PREVENTS FEVER AND AGUE, CHOLERA, YELLOW FEVER,

It brings sleep to the sleepless.
It has saved thousands of lives.
It has saved millions of doctors' bills.
It is pleasant to take--children cry for it.
It is purely vegetable and perfectly harmless,
It has more certificates than any medicine in the world.
It sells at the rate of 5,000 packages and bottles every day.
It is recommended by the most eminent physicians in the world.
It is recommended and used by more druggists than any medicine in America.
It is endorsed and used by nearly all the bishops and noted ministers in the land.
PREPARED ONLY BY C. F. SIMMONS MEDICINE CO., ST LOUIS, MO.

It's apparently also good for the livestock.

TO THE POINT:

The booklet has lyrics for a number of presumedly popular songs of the era (mostly in the vernacular of the era, which is non-PC in a few places).

DARLING NELLY GRAY, BY B. R.HANBY
OVER JORDAN.
THE OLD CABIN HOME
TRABLING BACK TO GEORGIA, BY C. D. BLAKE.
GENTLE ANNIE., BY S. C. FOSTER.
WHERE IS MY WANDERING BOY
UNCLE NED, BY S. C. FOSTER
IN THE MORNING BY THE BRIGHT LIGHT, BY JAMES BLAND.
MASSA,'S IN DE COLD GROUND, BY S. C. FOSTER.
LITTLE OLD CABIN IN THE LANE, BY WILL S. HAYS.
SHALL WE MEET BEYOND THE RIVER
KINGDOM COMING, BY HENRY C. WORK.
OLD FOLKS AT HOME, BY S. C. FOSTER,
ELLIE RHEE, OF CARRY ME BACK TO TENNESSEE, BY SEP. WINNER.
GOOD-BYE, LIZA JANE, BY EDDIE FOX
WE'LL WORK TILL JESUS COMES
THE LITTLE BROWN JUG.
THE OLD HOME AIN'T WHAT IT USED TO BE, BY C. A. WHITE.
BEAUTIFUL RIVER
DIXIE'S LAND, BY D. EMMETT
OH! DEM GOLDEN SLIPPERS!, BY JAMES A. BLAND,
OLD BLACK JOE, BY S. C. FOSTER
I'SE GWINE BACK TO DIXIE, BY C. A. WHITE
NINETY AND NINE
KEEP IN DE MIDDLE OB DE ROAD, BY WILL S. HAYS.
LISTEN TO THE MOCKING BIRD, BY ALICE HAWTHORNE.
JORDAN IS A HARD ROAD TO TRABEL, BY DAN EMMET.
NEARER, MY GOD, TO THEE.
LITTLE MORE CIDER, BY AUSTIN HART.
OLD DAN TUCKER.

My question: Is it of interest to anyone to have apparently authentic ca. 1886 lyrics to these?

As they are mostly well known, and have been discussed, I rather hate to waste the bandwidth to post them if there's no real use for them. (The full lyrics are about 35 pages in Word.)

John