Scope and Contents Note From the Collection: The eight postcards in this collection are to and from members of the Calahan family between the years 1916 and circa 1941. Four are to Gertie Calahan, three of those from Arthur Calahan during World War I. Another is from Arthur to his mother Mollie. There is also one to Joe Callahan and one to Ralph Callahan. There is one postcard per year from 1916 thru 1921. One postcard has no date, and another is copyrighted in 1941. All of the postcards from Arthur have their last name spelled as...