crossbow of one foot, two foot and 'a tour'

[fernando]

Amazingly also in this forum, despite the existing huge amount of material on crossbows, i (for one) don't recall the mentioning of such terms, which obviously refer different arming systems .
While 'one foot' or 'two foot' refer the arming mode of portable crossbows, the term 'a tour' is typicaly french and, alternated with the term 'treuil' (winch), is more connected with the arbalist, the heavy weight crossbow or even the siege machine that succeeded the catapult.

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