Possible Clues:

• Came across the old force but not by foot this way
• Ton type
• Came across Richard, but not by foot this way
• System for measuring crime's spread with time
• Came across the old force with the Continental measure
• Consisting of verses; pertaining to one system of measurement
• Kind of unit
• Relating to verse - based on the metre
• In feet? Yes and no
• Came across the old force ten