River and sand studies, with a Latin conjugation of 'amare'
Red chalk gone over in pen above a grammar drill written upside down.
In red chalk gone over with pen, the upper sheet shows what may be a barrier thrown across a river, above a rounded mass of sand piling up within the current, annotated 'rena' (sand). At the foot of the leaf, written upside down in pen, Leonardo drills the Latin verb 'amare', running through the present 'amo, amas, amat, amamus, amatis, amant' and beginning the imperfect 'amabam, amabas'. The water study and the grammar exercise are unrelated jottings that happen to share the page.
On this page
Barrier thrown across a river (?)
At the top of the sheet a red-chalk form, reinforced in pen, rises above a dense hatched, net-like band. The cataloguer reads it tentatively as a barrier set across a river channel.
Sand accumulating within the river
A central oval mass drawn in red chalk shows sand heaped up inside the flowing water, with the current wrapping around it. The drawing is annotated 'rena' (sand), naming the deposited material.
Conjugation of the verb 'amare'
Written upside down in pen, Leonardo works through the present tense of 'amare' (to love) and starts the imperfect. These are elementary Latin grammar exercises unrelated to the water drawing above.