May I , please, get a lookup for 1900-1910 Caddo Parish, Louisiana for William and Parthinia Powell? William would have been 28 in 1900 and 38 in 1910. Parthinia would have been 26 in 1910. Possibly, there was a daughter, Bertrise or Mertise in 1910.
P.S. Oh! they may also be in Bossier Parish...sorry