A marriage date of 18 Dec 1890 was apparently incorrect. The Arkansas County Marriage database at FamilySearch had the date as 9 Jan 1896 - license was taken out on Jan 4th, Franklin Co, AR.
1900 Census. Morgan, Franklin, AR
Buried Fairview Cemetery, Fayetteville, Washington Co AR
William Joseph GABBARD and Samantha Belle VAN BRUNT were married on 9 January 1896 in Franklin County, Arkansas.50 Samantha Belle VAN BRUNT was born in 1874.