Possible Clues:

• Not liable to, excused
• Be exceptionally kind to a taxpayer?
• Free from ten in Tempe
• Was almost void and free from duty
• Excused from physical training?
• Not subject to the former pet about a thousand
• Freed from obligation, tax etc
• Not liable to make ten with 'em if there's a pet around
• Not liable to give the Member tea below the river
• Not obliged