Photo 26 was taken by Newberg in Glenwood, Iowa.
Photo 27 is by Tolman, 810 Central Ave, Nebraska City, Nebraska
On the back, Mr. & Mrs. G.W. Lincoln is written. I'm unsure if the picture is of them or to them.
Photo 28 is by Kiddoo in Glenwood, Iowa
Photo 29 is by Central Photo Co, 816 & 818 N. 6th St. St. Louis, MO.
Photo 30 is by Flanders in Glenwood, Iowa