If it feels like an Alberti Cipher it is one!

[coded]

d_a_ii_n    

I believe this word to be litus:  Since the majority of the manuscript contains plants that need water and folio 13.

1. the sea-shore, seaside, beach, strand
   
   
2. A landing-place
   
   
3. The shore of a lake
   
   
4. The bank of a river
   
   
5. Land situated on the sea-side
   

ch_e_d_y

This word I think is (orsi):  Its a high frequency word in Latin.

1. to begin a web, lay the warp, begin, commence, make a beginning, set about, undertake