I would suggest you look at this area of TN marriage records:Cannon and Dekalb - earlier Wilson and Smith Co Tn.
There are several Spurlock / Herriman marriages in this group......I was told by a Spurlock researcher that many of these went to Arkansas - following Miles Spurlock who was born 1804 in KY - they were moving out of Cannon Co TN area. This info was from Howard Harvey - and he said probably after 1850 was when many of these Herriman/Spurlocks moved to Arkansas.
I have Sterling Brown Herriman married Elizabeth Spurlock 27 Apr 1850 Cannon Co TN...she was d/o Francis Sprulock who had lived in Wilson Co in 1830, 1850 he is on the census for 10th district Cannon Co TN.(he might not have moved, just the county changed.).This Frances Sprulock is on several of the records as wittness for my Turneys in the 1830s and the Turneys lived right where Dekalb and Cannon Co meet....earlier it had been Smith Co.
I have two Herriman sisters: Nancy Herriman married 1840 TN to Wooden C Spurlock Elizabeth Herriman married 1830 to Jefferson Brooks Ledbetter in Cannon Co tN area (probably Wilson records)...and they were in Arkansas long before 1850.