William Babbitt Haynes was born on 11 January 1803, in Rutland, Vermont, his father, Lemuel Haynes, was 49 and his mother, Elizabeth Babbitt, was 39. What is known of his life is sparse. He was enrolled in Middlebury College in 1825 through 1828 but did not graduate with a degree from there. He married Mary E Case on 16 January 1835, in New Lebanon, Columbia, New York. At the time of his mother, Elizabeth Babbitt Haynes, death on February 8, 1836 William was said to be have been engaged in a law office in Massachusetts. William Babbitt and Mary E. Haynes were the parents of William Jay Haynes born in Rutland, Vermont in 1838, Mary Elizabeth Haynes in Rutland in 1839 and Samuel Woodbridge Haynes born in Otis Massachusetts in 1840. He and all his family were listed in the 1840 census living in Otis, Berkshires, Massachusetts where William Babbitt Haynes died on December 22, 1840 at the age of 37.

https://ancestors.familysearch.org/en/MFM3-P7K/william-babbitt-haynes-1803-1839

announcement
Please note: the term ultimo means the previous month. Checking an 1835 calendar, the 16th of January fell on a Friday. The source, Newspaper.com had February 16th in their title as their marriage date.      

Mary E Case was born on 12 December 1814, in Barkhamstead, Litchfield, Connecticut. Her father, Manna Case, was 28 and her mother, Abigail Phelps, was 25. She married William Babbitt Haynes on 16 January 1835, in New Lebanon, Columbia, New York. They were the parents of William Jay Haynes, Samuel Woodbridge Haynes and Mary Elizabeth Haines and lived in Rutland, Vermont until moving to Otis, Massachusetts circa 1840. After William's death in 1840 she remarried Dr. William Madison Whipple and her children took the Whipple name. Their family added Valentine Moss Whipple, born in 1844 and died in 1923, Frank E. Whipple, born in 1849-and died sometime after 1910, Ellen Whipple, born in 1853-and died sometime after 1880 and Dean Swift Whipple born in 1855 and died in 1904. The family lived in Pierce, Wisconsin in 1860 and California in 1870. She died on 12 January 1879, in Saratoga, California, at the age of 64.

https://ancestors.familysearch.org/en/K87M-MBF/mary-e-case-1814-1879
wbwgrave
The inscription reads:
Sacred to the Memory of
WM. B. HAYNES
died
Dec. 22, 1840
AE 34 Ys.
How Sudden was the fatal stroke
when the lord his summons spoke
My wife and children now dreamed
and see that you for death prepare

His headstone rests in the Otis Center Cemetery
Old Section A-B Plot 306

Personal Note:
The dates of William Babbitt Haynes birth and death on this headstone seem to be in error. Recent discoveries of documents of his marriage, census records, children's birth years pieced together where he, Mary and their children lived have filled in more of his life that was missing when I began this twenty years ago. The evidence I've found is that he was born on January 11, 1803 in Rutland, Vt.  with his twin brother Samuel Woodbridge Haynes and died in Otis, Massachusetts on December 22, 1840 which would make him 37 at the time of his death.
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The inscription reads:
Mary E.
Wife of
James M. Whipple,
Born at
Barkhamstead, Mass.
Dec, 12, 1814.
Died Jan. 12, 1879:
Madronia Cemetery, Saratoga, California.