The Ship's list
"TheShipsList website, online since August 1999, will help you find your ancestors on ships' passenger lists. We also have immigration reports, newspaper records, shipwreck information, ship pictures, ship descriptions, shipping-line fleet lists and more; as well as hundreds of passenger lists to Canada, USA, Australia and even some for South Africa."
The passengers lists for North America on this site include reconstructed lists of surnames for the Petworth ships. These names were drawn from Assisting Emigration to Upper Canada, Part 2, "Emigrants on Petworth Ships, 1832-1837" where we recorded additional family information and our sources as we were able to identify them in the course of writing the book. http://www.theshipslist.com/ships/passengerlists/petworth.shtml
In addition the Ships Lists site has a range of useful entries contemporary to the Petworth emigrations.
"The Héritage project is a 10-year initiative to digitize and make accessible online some of Canada’s most popular archival collections encompassing roughly 40 million pages of primary-source documents. Chronicling the country and its people from the 1600s to the mid-1900s, this collection represents a vast and unique resource for Canadian historians, students, and genealogists."
Early Canadiana Online
"The Canadiana Online collection contains 19 million pages (96,000 titles) of digitized historical publications, including monographs, serials, and government publications. The collection is largely composed of materials published prior to 1921. Canadiana Online also includes all content from the closed Early Canadiana Online (ECO) collection, including content from the CIHM microfiche series."
Most of Thomas Sockett' published books and pamphlets and Charles Barclay's Letters from the Dorking Emigrants were in the CIHM microfiche series and are copied here.
The National Archives of the United Kingdom
East Sussex Record Office
Library and Archives Canada
Archives of Ontario, Toronto
Ontario Ancestors: the Ontario Genealogical Society
"The Ontario Genealogical Society has 30 geographically based branches throughout Ontario together with 5 special interest groups (British Home Children, Eastern European, Scottish, Irish and Irish-Palatine)."
Global Genealogy is a Canadian company selling print and digital books as well as other family history resources. Here are their Upper Canada / Canada West / Ontario sources: http://globalgenealogy.com/countries/canada/ontario/resources.htm