Mrs. Mary Bergstrom made an earlier appearance in a post with Mrs. Baldridge and Edna Baldridge. In this photo set she sits in formal wear with her sibling and husband Mr. John Bergstrom. More digging revealed a photograph of the Bergstrom's daughter Ellen, pictured in her white winter jacket and hat. They are listed in a transcribed 1910 Oak Point Census report by David Williams under the name Bystrum.
The Persson, Bergstrom, Bennett and Baldridge families were obviously a close circle of friends. They likely worked for an outfit named W. L. & T Co. Possibly the "W" represents a surname and the "L & T" are short for Lumber and Timber? Any mild research I've done trying to decode this company's abbreviated name has resulted in mostly dead ends. I'm still perusing leads, but there's no immediate history available.
There is however, successful identification of several families and individuals. And with the available genealogy resources online, I'm confident there'll be reunions to come.