A birth year of about 1842 would be estimated from the 1850 Census of Hunterdon County, New Jersey (roll 453, p. 93). She was listed as eight years old. Mary Jo C. Martin in Melbourne, Australia at MartinSM@Ocean.com.au has some info on this family.
This comes from a New Jersey newspaper:
January 5, 1886, Forty-Eighth Volume, No. 21
On the morning of the 3rd inst., Miss Lizzie Baldwin, daughter of Mr. Stewart C. Baldwin, of Trenton, (formerly a resident of this county,) while suffering from mental derangement occasioned by over study before her recent graduation from one of the Trenton schools, eluded the vigilance of her parents and escaped from the house, and running to the water power, nearly a mile distant, threw herself into the water. Her body was recovered next day... She was engaged to be married to Mr. Jacob Parse, of Flemington, and when her body was found in the water the engagement ring was still upon her finger. Her mother was a Miss Susan Bodine, sister to Mr. J. P. Bodine, of this place.
From Ronny Bodine:
From New Jersey Marriage Records: Stewart S. Baldwin married Susan Bodine on 22 Sept 1858 in Franklin Township, Hunterdon County.
From: Richard Higgins: A Resident and Pioneer Settler at Plymouth and Eastham, Massachusetts, and at Piscataway, New Jersey and His Descendants, by Mrs. Katharine Chapin Higgins, Worcester, Mass., 1918, p. 306-307.
Susan Bodine, b. Sept. 17, 1837, married Sept. 22, 1859, Stewart C. Baldwin, and had Hattie, Lizzie, George, Jesse, Mary Ann, Harry, Susan, Thomas, Robert and Martha, all b. at Trenton, N. J., where parents lived;
From New Jersey Federal Census Records:
1860 (19 Aug) Delaware Twp., Hunterdon Co.: Steward C. BALDWIN 33 NJ Iron Moulder, Susan 23 NJ, Louisa 12 NJ, Emley 8 NJ, Hettie 1 NJ.
1880 (8 June) Trenton, Mercer Co.: Stewart C. BALDWIN 54 NJ Lockmaker, Susan 42 NJ wife, George D. 17 NJ son Lockmaker, Lizzie G. 19 NJ dau School Teacher, Jesse B. 12 NJ son, Harry R. 9 NJ son, Thos. C. 7 NJ son, Mattie 2 NJ dau, Robt. 3/12 (Oct.) NJ son.
1900 (9 June) Trenton, Mercer Co.: Stewart C. BALDWIN Aug 1826 NJ married 38 years Iron Moulder, Susan Sept 1837 NJ wife married 38 years 10 children born/6 living, Thomas May 1873 NJ son Insulated Wire, Mattie Dec 1877 NJ dau, Robert Feb 1880 son Machinist.
Death Notice, Trenton Evening Times (Trenton, N.J.) of 28 May 1902.
Stewart C. Baldwin died yesterday, aged 76 years. The funeral will be held tomorrow afternoon, at 3 o'clock, from his late home, 128 Rusling street, with interment at Mercer cemetery.
Death Notice, Trenton Evening Times (Trenton, N.J.) of 27 April 1904.
Susan C. Baldwin, widow of Steward C. Baldwin, was buried this morning at Riverview cemetery. Mrs. Baldwin died Sunday in Philadelphia. Services were held this morning at 8 o'clock from her late home, 1614 South Thirteenth street, Philadelphia.