Sheila,
I have no personal knowledge or connection to this family but found the following in my resource material. Hope this is the right family.
1850 Federal Census
Dallas Co., Missouri
179-171.....$200.....Farmer
Gregg, Samuel...age 26...OH
...Olive...age 23...OH
...John...age 3...MO
...Missouri A...age 2...MO
...Samuel...age 1...MO
1860 Federal Census
Dallas Co., Missouri
Jackson Township
271-10.....$2000-$100.....Farmer
Gregg, Samuel...age 36...OH
...Olive...age 33...OH
...John...age 14...MO
...Zurea...age 12...MO
...William...age 9...MO
...Elizabeth...age 7...MO
...Marion...age 5 (m)...MO
...Larenzo...age 3 (m)...MO
...James M...age 8/12...MO
1870 Federal Census
Dallas Co., Missouri
Jackson Township
21-21.....$7000-$1400.....Farmer
Gregg, Samuel...age 46...OH
...Olive...age 43...OH
...Missouri A...age 22 (f)...MO
...Elizabeth...age 17...MO
...Marion...age 15...MO
...Lerouzy...age 14 (f)...MO
...James M...age 10...MO
...Sarah F...age 8...IA
...Olive...age 5...MO
...Ira F...age 2...MO
...Martha V. (b. May)...age 1/12...MO
Do not find this family in the 1880 Dallas Co. Census.
Hope this helps.
Kathy
Look-up Volunteer