Latin declension of the pronoun qui, quae, quod
The full case paradigm of the relative and interrogative pronoun, singular and plural, in mirror script
This page is given over to a Latin grammar exercise: the complete declension of the pronoun qui, quae, quod ('who, which, what'), set out case by case in Leonardo's mirror script, first singular then plural. It runs from the nominative and genitive down through dative, accusative, and ablative, with alternative forms noted. Faint leadpoint sketches of a wheel or pulley, a long horizontal bar, and a suspended weight also mark the leaf, echoing the mechanical studies on the surrounding pages.
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Declension of qui, quae, quod
The pronoun is declined through all cases in both numbers: nominative quis/qui, quae, quod or quid; genitive cuius; dative cui; accusative quem, quam, quod/quid; ablative a quo / a qua. The plural follows: nominative qui, quae, quae; genitive quorum, quarum, quorum; dative quibus; accusative quos, quas, quae; ablative a quibus.
Faint mechanical sketches on the leaf
Beyond the grammar, the sheet carries faint sketches: a wheel or pulley at upper left, a long horizontal bar suggesting a lever or beam across the middle, and a small suspended weight lower down. They are drawn lightly and are not tied to any transcribed note.