The majority of the collection includes letters written by William to his two sisters Lillian and Leah. There is also a single letter written by William to his parents shortly after his arrival in England.
The collection also contains official letters sent to the family regarding the death of William. The aspect of the correspondence begins with the official telegram sent to the family and also includes the efforts to determine what exactly happened and where William was buried.
The collection of letters has been transcribed and available as a PDF for the convenience of readers and researchers.