What follows is not a census or enumeration or in any way complete. Materials relevant to this edition are widely scattered, and I have not examined them all. Some have doubtless escaped my attention entirely. However, all the repositories or collectors I have visited or contacted (private owners identified by permission only) are in the list below, where their holdings are briefly sketched. The Text and Notes section of this volume identifies all MSS where possible by a source abbreviation from this list and special collection name with box and folder, folio or page numbers. It also cites printed books, catalogues or articles describing these collections. I have provided these details not to be pedantic but rather to help the reader find sources, e.g., there are Rossetti MSS in eight discrete collections in different rooms on different floors in the Library of Congress.

The sources are divided into major and minor. An abbreviation for each source, used throughout the text, precedes its full name.