The fonds consists of personal, official, and business correspondence and other papers of three generations of the Owen family, namely Thomas, Lemuel Cambridge, and William E. These include records of enterprises in which these gentlemen were involved including the postal service, various banks, and steamship companies as well as papers from Lemuel Cambridge Owen's time in political office. The largest portion of the fonds is comprised of the business correspondence and other papers of the firm of Welsh and Owen of Charlottetown. There are also a few documents which relate to Samuel Holland and to the Cambridge family as well as some miscellaneous material and memorabilia.

Item lists, primarily in chronological order were prepared for this collection when it was first received and the order does not fall completely within the parameters of the series identified for description. However, listings of item numbers contained within each series are included in the series descriptions. The fonds is comprised of the following nine series:

1. Holland family papers
2. Thomas Owen papers
3. L. C. Owen papers
4. William E. Owen papers
5. Post Office records
6. Welsh and Owen business papers
7. Plans
8. Owen/Welsh family memorabilia
9. Miscellaneous collected items