Copies of your first briefs are accessible below

First Brief - letter format
First Brief - larger format

da Vinci made 15,000 pages of (I believe) one-page expressions of his thoughts, of which only 6,000 are known to have survived. Each page contained a drawing and text to give his thoughts on the topic. These drawing are compiled in Codices, with collections given different names. They usually belong to certain periods of his life.

Codex Leicester, also named Codex Hammer, is the best know among them since it is exhaustive. Bill Gates bought it recently for $50M. A full size copy is located in the Oversize books section of the Special collections in Norlim. It has the following call number

To access Leonardo's drawings in his manuscripts in the Library of Spain; Google Search: Codex Madrid, Cornell Library This should bring up a website "Codex Madrid-ecommons@cornell university" Click on this website and lists of folios of Leonardo's drawings will appear; Note: page numbers are folio numbers front and back: "Recto" and "Verso"

In these briefs you are asked to follow the method of da Vinci, that is one page with a drawing and some text that relates to the drawing, like da Vinci.

The drawing, preferably, should be done in your own hand, even if it copies what da Vinci has made.
The text should be brief, about 100-200 words, written crisply, without repetitions, and speaking directly to the reader. Each word and every sentence should be meaningful.