The son of Rev. Thomas B. Greer and his wife Ursula Jane Webb of Franklin Co., VA and Monroe Co., MO.

Walter came to Missouri on a wagon train in 1840 with his family. His father was a farmer and Primitive Baptist minister. They settled down to farm near the town of Paris, county seat of Monroe Co., MO. His father Rev. Thomas B. Greer quickly became leader of the Baptists in the community and established a church. He died in 1845, and Walter's mother returned to Virginia with the younger children, including Walter. He was listed on the 1850 census in Rocky Mount, Franklin Co., Virginia with his mother and siblings still at home.

Once Walter grew up, he returned to Missouri to join one or two older brothers and other relatives.

He married on 12 May 1859 in either Monroe Co., MO or Macon City, Macon Co., MO to Martha Elizabeth Craig.

I haven't been able to find him on the 1860 census.

Civil War - Walter C. Greer served in the Union army in the 32nd Missouri Infantry, Company B as a private, then in Company D in the new 32nd MO Infantry. He served with a Frederick Greer who was also in Company D.

In 1870, he was living with his wife and children near his brother William near Macon City, Macon Co., MO:

1870 census, Macon Co., MO, Russell Township, p. 154
[indexed as "Green"]
W. C. Greer, 33, Painter, pers. prop. $200, VA
Elizabeth, 28, MO
Julia, 8, MO
Henry, 10 mos, MO

1880 census, Macon City, Macon, MO, p. 377B
Walter C. Greer, 45, painter, born VA; parents born VA
Martha E., 38, MO KY VA
Ula A. [Julia], 18, MO
K. Maud, 8, MO
Frank, 5, MO

Walter died sometime between the 1880 and 1900 censuses, as did Martha. I believe they are buried at Woodlawn, but Martha has an obituary I haven't seen that may confirm it:

"Mrs. Watt C. Greer" has an obituary in a Macon Co., MO paper.

Children:

1. Julia Greer, b. 1862, Macon Co., MO.

2. Henry Greer, b. Aug 1869, Macon Co., MO; d. by 1880, Macon City, Macon Co., MO.

3. K. Maude Greer, b. 1872, Macon Co., MO.

4. Frank Greer, b. 1875, Macon Co., MO.