Ask your librarian if a library near you has a subscription to Ancestry.com - you can view the census images online.
As far as I know, there is no printed index for 1910. To find the information you are looking for on the census, you would have to find the information on the Soundex Index that is also on microfilm. Ask your librarian for help.
Go to this site for instructions on how to order... I paid just $5 when I ordered information.
Natchitoches Parish was created in 1807 and is the original parish
Natchitoches Parish, P.O.Box 799, Natchitoches, LA 71458-0799 1-337-323-5188 Clk Ct has m rec from 1780 Call ahead for fees. The clerk who takes your call may be able to do a lookup for you. Some do, some don't. It's worth a try. If you write for information, be sure to enclose a stamped, self-addressed envelope.