Is there a script of St. Francis' "famous" speach in Bologna, the 15th of August of 1222?

I was reading a book about St. Francis and there is a mention about a "famous" speech he gave in the piazza of Bologna, the 15th of August of 1222. There are several descriptions around of this speech. For example, [this book](https://books.google.cl/books?id=yVG1oWcd1ScC&lpg=PA135&ots=EFy0P-Qmm_&dq=St%20francis%20preaching%20in%20bologna%2015%20august%201222&pg=PA135#v=onepage&q=St%20francis%20preaching%20in%20bologna%2015%20august%201222&f=false) mentions: Footnote 69 above mentions [this page](https://www.dmgh.de/mgh_ss_29/index.htm#page/580/mode/1up) in Monumenta Germaniae Historica. The key passage is: This text was originally published in [Historia Salonitana](https://en.wikipedia.org/wiki/Historia_Salonitana) and can be found [here](https://books.google.cl/books?id=B6xNIF-9PmgC&lpg=PA386&ots=60g4M_9nNQ&dq=Historia%20Salonitana&pg=PA178#v=onepage&q&f=false) , together with an English translation (page 178 and 179 respectively). I haven't however found the original sermon. [This blog entry](https://idlespeculations-terryprest.blogspot.com/2012/09/preaching-in-bologna-angels-people-and.html) seems to incorrectly state that the above document contains the full sermon. Anyone aware of where can such sermon be found?