Just in case it helps (and since I have it here at hand in the Desoto Cemetery Book published 1987)

In Center Hill Cemetery (located R5W, T1S, Sec.20)
Cartwright, Charles D. 6 Oct 1873 - 14 Dec 1915
Cartwright, Eliza Camell 21 Oct 1847 - 19 Jsn 1897
w/o N. B Cartwright
Cartwright, Neil Buford 9 FEb 1885 - 23 Sep 1902
s/o N. B. & E. C. Cartwright
Cartwright, Mary Elizabeth 12 Mar 1871 - 26 Oct 1895
d/o N. B. & E. C. Cartwright
Cartwright, Neil Drown 17 Aug 1847 - 19Dec 1910
s/o A. R. & P. B. Cartwright
Cartwright, Lillian B. 28 Oct 1877 - 10 Aug 1878
d/o N. B. & E. C. Cartwright
Cartwright, Debbie 30 Jun 1875 - 27 Nov. 1875
s/o (sic) A. M. & E. C. Cartwright
Cartwright, Elizabeth A. Haraway 14 Dec 1844- 22 Jul 1907
w/o A. M. Cartwright
Cartwright, Albert M. 14 Feb. 1845 - 1 Nov 1929
Cartwright, Albert M. Jr. 14 Dec 1872 - 27 Aug 1904
Cartwright, J. Priscilla 8 Jun 1883 - 4 Jun 1965
Allen, Betty Cartwright 14 Jun 1885 - 1 Dec 1974
Kaiser, William W. 15 Nov. 1897 - 6 Nov. 1970
(I include him since he is buried among the Cartwrights)
Goodrich, Robert S. ? - 29 Nov 1957
Goodrich, Mary Cartwright ? - 16 Aug 1955
Buchanan, Susie Cartwright 10 Jul 1884 - 8 Feb 1915
w/o Ryburn Buchanan
d/o W. E. & Ella M. Cartwright
Cartwright, William E. 4 Oct 1855 - 23 Nov 1911
Cartwright, Ella Spencer 16 May 1861 - 30 oct 1919
w/o W. E. Cartwright
Cartwright, Anna Edmonin 26 Oct 1902 - 16 Nov 1903
d/o W. E. & Ella S. Cartwright
Cartwright, Marcus T. 23 Jun 1838 - 10 Mar 1864
Cartwright, Tullius 30 May 1838 - 10 Mar 1864
d/o M.T. & Mollie Cartwright
Cartwright, Albert Robert 14 Aug 1806 - 18 Jun 1863
Cartwright, Priscilla Buford 10 mar 1818 - 15 Nov 1887
w/o A. R. Cartwright
d/o James & priscilla Gidlens
Cartwright, Charles W. 16 Nov 1842 - 2 Apr 1885
Cartwright, Emily Irene 10 Feb 1853 - 5 Mar 1937

Others that may or may not ne connected to the Cartwright family (just a guess on my part)
Spencer, R. W. 23 May 1822 - 5 Jan 1898
Goodrich, Robert G. 23 Jan 1846 - 21 Oct 1911

I can not find anyone with surname Blackstone in Desoto CO.,MS but the Center Hill Cem. (above) has several with surname: Blackwell.

There was one William Lyles Blackman in Desoto County, he was s/o Cullen Abner Blackman whose mother was a Boon whose family came from North Carolina to Desot Co. circa 1836-1840,