I cannot say that I'm 100% sure.I got the information from the Surry County Heritage-North Carolina Vol. II.The birth date and death place was the only information provided for Abel.It's possible the person who compiled the information on Abel (descendent of Hasting Dockery Sr. and Elizabeth ???) was incorrect for Abel.I wish I could be more specific at this time.
William Dockery did have several sons who could have been your Abel's father other than Hasting.They are Benjamin, William H., Hiram, and Balaam.