__
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_William DE VERNON __|
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| |__
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_Richard VERNON _____|
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| | __
| | |
| |_____________________|
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| |__
|
|
|--William DE VERNON
|
| __
| |
| _____________________|
| | |
| | |__
| |
|_____________________|
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| __
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|_____________________|
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|__