16–17.  Walter Gilbert was born in Warren, Kent, Litchfield County, Connecticut, on Tuesday, March 31, 1795, and died in Middleville, Barry County, Michigan, on January 21, 1873. Hannah Calvin was born in Loudoun County, Virginia, on Tuesday, August 28, 1804, and died in Middleville on January 6, 1879. They were both buried in Parmalee Cemetery, Thornapple Township, Barry County. They were married in Portage County, Ohio, on Thursday, November 2, 1820. She took the name Hannah Gilbert. He is the son of Truman and Eunice (Phippeny) Gilbert. She is the daughter of David and Catherine (McDaniel) Calvin. They had seven children:

Walter Gilbert was born in northwest Connecticut; his date of birth was determined from his age at death, 77y 9m 21d, as given on his tombstone. In 1806, when he was 11 years old, the family moved to Portage County, Ohio. Here he met and married Hannah Calvin. They lived in Paris Township of Portage County where their children were born. Between 1840 and 1844 the family moved to northwest Ohio, Centre Township of Williams County; then between 1853 and 1860 some of them moved to Middleville Township, Barry County, Michigan. Census records give his occupation as farmer.

Their three daughters and son, Joshua, were married in Williams County between 1845 and 1858. In the History of Williams County, Ohio on page 497, Centre Township, it is written that the construction of the Disciples' Church was assisted by Isaac Ewan (Betsy's husband), $315, and George Miser (Urania's husband), $75. C. M. Gilbert contributed $120, although his relationship with the other Gilberts has not been established.

Walter Joshua Gilbert, grandson of this Walter Gilbert, and son of Truman Gilbert, remembers that Walter and Hannah (Calvin) Gilbert had children: Sophronia, Betsy, Homer, Joshua, Truman, and another daughter with a married name of Miser, and there may have been others. He is the source of much of the information on his aunts and uncles mentioned above.

Hannah's date of birth was determined from her age at death, 74y 4m 9d, as given on her tombstone. A visit to Parmalee Cemetery in January, 1983, found her stone, and her husband, Walter's, to be simple tablets. While hers was erect and quite readable, his had fallen over and was buried in snow and leaves. This may account for her presence and his absence in one available census of this cemetery. The stone was repaired and reset.

In 1850, the unknown male in the 1830 and 1840 censuses would have been 25–30 years old and probably married, having his own census entry. In the same census on page 67 is David Gilbert, age 22; on page 69A is Champion Gilbert, age 40, and wife Eliza, 35, and eight children; on page 70 is Vincent Calvin, 40 and Eli B. Gilbert, 32; on page 70A is Henry Gilbert, 30, wife Fidelia and two children; Caroline Gilbert is living with Thomas and Harriet Darling; and on page 72 is Orlando Gilbert, wife Lucy, and five children. (This census was taken August 19, 1850.)
The Henry Gilbert mentioned above was the grandson of Walter Gilbert's uncle, Heber. His parents were Josiah Edson and Nancy (Bacon) Gilbert. His wife was Fidelia Clementine Darling.

The Atlas of Barry County, Michigan—1873, the year that Walter Gilbert died, shows, in Thornapple Township, H. (Homer?) Gilbert with a one-acre lot in the southwest corner of northwestern quarter of the northwestern quadrant of section 10, and Josh Gilbert with 120 acres of section 22, including part of the town of Middleville. His land was the northwestern quadrant of the section, all but its southwestern quarter.

The International Genealogical Index has four entries for Walter Gilbert. Two give his birth year as 1792 and two as 1793. They all give the same birth place.

• Tombstones in Parmalee Cemetery, Thornapple Township, Barry County, Michigan. [Walter and Hannah's birth and death dates.]
• Marriages in Portage County, Ohio [D.A.R. Library]
• Index to Marriage Records of Williams County, Ohio, LDS film 914036.
• International Genealogical Index/North America (several entries)