Below is a list of sources that I have used in my research:

UK Sources
Relatives
GRO Indexes for Births Marriages and Deaths 1837- date
Census 1841,1851,1861,1871,1881,1891,1901,1911
Local Superintendent Registrars Office
National Archives (Public Record Office)
County Record Offices
Local Study Libraries
Local Census
Trade and Telephone Directories
Society of Genealogists
Family History Books and Magazines
Wills
Newspapers, Old Maps and books
Parish Church Records
Cemeteries and Crematoria
Family History Societies
Church of Jesus Christ of Latter Day Saints
Family History Centres

Swiss Sources
Relatives
Parish Church Records
Commune
Civil Registration
Family Records
L’Archivio Cantonale
Federal Archives
Passports
Swiss Genealogical Society
Books
Newspapers
Local Museums
Casa Stanga- Giornico, Valle Leventina

French Sources
Meuse Conseil General Records