They were in the 1870 census:
Hardy Shadrick age 28 (Mo) (Saline Twp)------------------
Mary age 26
Minerva I. age 7 (could Minerva's middle name be Isabell after (g-ma)
Nancy A, age 5
Emily age 2
John age 1
There was a John Shadwick who married Francis Bailey, 7/16/1867.
Charlotte Shadwick married Benjamin F. Farris, 1/14/1866.
Mary F. Shadwick married Josiah Long, 12/13/1868.
James Shadwick (Moniteau County) married Eliza Rollins, 1/27/1849. The
Longs married into these Rollins.
Alfred Shadwick married Mary Jordan, 2/23/1845 (Moniteau County)
Alfred V. Shadwick married Sally Ann Atchinson, 10/17/1875.
George H. Shadwick married Mary E. Sullens, 726/1879.
Rebecca Shadwick married William R. McDaniel, 2/6/1876.
C. Shadwick served with the Company K, Cole County Home Guards in
1861.
There was an Isabell Shadwick age 72 (N.C.) living with the Lewis
Pruitt family in the 1860 Miller Co. census. Could this be Hardy Sr.'s
wife. (Saline Twp)-----------
There is a John Shadwick and Hardy Shadwick buried in the Allen
cemetery: (Saline Twp)------------------
John Shadwick born 8/121823 -11/21/1891.
Hardy S. Shadwick 1842-1902
Broken stone 1861-193?.

Something has happened to a Shadwick family. There are children
scattered with other families. 1880 census (Saline Twp)--------------

There is a John Shadwick age 12 (adopted) by the James Procter family.

Ellen Shadwick age 8 living with the Benjamin Sturges family.

Belle Shadwick age 17, living with John and Nancy Long.

W. D. Shadwick age 7 (adopted) by William & Susan Woolkit.

DeVere