William Bradford's writings have been the primary source for Mayflower history since the ship's landing in 1620, but information omitted by Bradford has subsequently been published, elaborating on the history of our Pilgrim Fathers and other "first-comers" to New England.
This book, for example, contains information about where the Pilgrims came from, their occupations, and some genealogical information. Furthermore, it includes information about three ships that arrived after the Mayflower - the Fortune, the Anne, and the Little James. It was originally published in 1929 and this copy, shown here courtesy of Archive.org, was published in 1962:
"The English ancestry and homes of the Pilgrim Fathers who came to Plymouth on the "Mayflower" in 1620, the "Fortune" in 1621, and the "Anne" and the "Little James" in 1623, by Banks, Charles Edward, 1854-1931, [Alternate Link]
See my previous posts, "The Great Migration" and "Timeline of American Immigration" for more information on early immigration to America and Colonial times. You might also be interested in The Winthrop Fleet.
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