Topography of Lake Como and the Alpine Valleys
A written survey of Valchiavenna, Valsassina, the Valtellina and Bellagio — mountains, waterfalls, mines, wildlife and prices
The larger fragment carries one of Leonardo's topographical descriptions of the country above Lake Como: the Val di Chiavenna where the Mera enters the lake, Valsassina, the Valle d'Introzzo, Bellagio and the Valtellina, with distances, inns and the routes of the Mera and the Adda. He records barren high mountains, cormorants, firs and larches, deer, ibex, chamois and bears, waterfalls of 400 braccia and the Fiumelaccio falling sheer into the lake, and closes with market prices of wine, veal, salt, butter and eggs. The smaller upper fragment bears two labelled figures (points c b a and n c b a) and columns of numbers.
On this page
The valleys above Lake Como and their routes
Up the lake toward Germany lies the Val di Chiavenna, where the Mera flows into Como between narrow mountains that run 20 miles to right and left, with good inns from mile to mile. Valsassina comes from the Italian side; the Valle d'Introzzo yields firs and pines; the Valtellina is the valley through which the Adda passes, having first run more than 40 miles through Germany.
Barren mountains, waterfalls and mineral veins
Here rise barren, very high mountains with great crags; up the river are waterfalls of 400 braccia that make a fine sight. Opposite Bellagio the Fiumelaccio falls more than 100 braccia sheer into the lake with inestimable roar, flowing only in August and September. At the head of the Valtellina stand the ever-snowbound mountains of Bormio.
Market prices in the Valtellina
In this country anyone may sell bread and wine: wine is worth at most one soldo the boccale, a pound of veal one soldo, salt ten denari and butter likewise, their pound being thirty ounces, and eggs one soldo the tale. The valley makes strong wines in quantity and so much cattle that more milk is said to be born there than wine.
Two labelled figures with number columns
On the upper fragment are two small figures, the first lettered c b a and the second n c b a, drawn as a triangle with a hanging weight and a circle crossed by lines. Beside them stand two columns of numbers worked through the figures.
