Mary Justifina Anderson was a younger sister to August, Charlie and John. Mary was born in Sweden in 1875 and later surfaced in Seattle, Washington (Snohomish county) in 1899 when she married to a Alfred Gullikson, also a Swedish born person. 1910 U.S. census records indicate they had two sons, Albert C. (1) and Walter H. (3). We have correspondence between Mary and her brother Charlie written in the Swedish language; maybe additional clues to times and location are hidden in them.
We also have some images of who we believe are Mary and perhaps her husband Alford that I will post as soon as we reasonably verify them.