This was generally the case with Humanistic Cursive Book Script. Because this script was intended as a more rapid form, it is understandable that more abbreviations were used. Certain abbreviations were used consistently in MS 13. These include abbreviations for terminal letters as well as the common abbreviations for m, que, qui and quod. MS 13 was written in brown ink by one scribe.
Joined letters are frequent throughout.
Fusion of letters is rare. The Humanistic feature of the two-compartment g is common throughout. These Semigothic Cursive letter-forms were often favored in Humanistic Cursive Book Script. Each one spans four lines and extends into the margins. Bruni's prologue begins with a red Q framed in blue pen-work with blue penwork designs inside and outside the initial.