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| The Pioneers | ||
| James Sandle Ford (1811-1890) | Havant, Hampshire, England 1844 |  |
| The Next Wave | ||
| John Boswell Clark (1833-1901) | Aberdeen, Scotland | |
| William Hughes (1841-1904) | Cty Antrim, Ireland | |
| The 1870s | ||
| John Farnsworth (1850-1883) | Clay Cross, Derbyshire 1866 |  |
| The 1900s | ||
| William Schlipalius (1879-1947) | Dresden, Saxony, Germany 1912 |  |