Tribulations of Family Photography: uncooperative family members

Uncooperative family members, Davenport, Iowa, circa 1909

One suspects that this photo session is a "wash". The boys in this picture are probably the twin sons of Olof Swenson, Elliot and Emmett Swenson (born in 1904). I'm estimating they are about 5 in this picture, thus dating the picture to circa 1909.  (That might be Olaf Swenson trying to get them under control - but I thought he had less hair!)

Olof built a house for his parents, Anders and Bengta Swenson behind his own house on Belle Avenue  in Davenport, Iowa about 1904. In this picture, the house on the left is probably the Anders/Bengta house, while the steps on the right probably belong to the Olof Swenson house.

Identifiers: 
Negative: Paulson149 (1200 bpi tiff downsized to 400 bpi jpeg for this post)
People:
   Elliot Washington Swenson (b 22 Feb 1904, Davenport, Iowa; died 10 Jul 1971, Memphis, TN)
   Emmett Washington Swenson (b 22 Feb 1904, Davenport, Iowa; died 19 Jan 1985, Belton, TX)
   Olof Andrew Swenson  (b. 15 Sep 1858, Sweden, immigrated to the U.S. in 1880; died 28 Aug 1851,   Davenport, Iowa)
Place:
   Davenport, Iowa.  Belle Avenue
          In 1909 - 710 and 710 1/2 Belle Ave
          In 2014: 1428 and 1428 1/2 Belle Ave.  (Numbers changed about 1920)