During this time, he published Il Trentino veduto da un Socialista ( Trentino as seen by a Socialist ) in the radical periodical La Voce .  He also wrote several essays about German literature, some stories, and one novel: L'amante del Cardinale: Claudia Particella, romanzo storico ( The Cardinal's Mistress ). This novel he co-wrote with Santi Corvaja, and was published as a serial book in the Trento newspaper Il Popolo . It was released in installments from 20 January to 11 May 1910.  The novel was bitterly anticlerical, and years later was withdrawn from circulation after Mussolini made a truce with the Vatican. 
The following is from a knowledgable source: As far the numbering convention is concerned, the 11, 21, etc. is usually either based on the “go” of the day OR the the flight within a “go”. To explain, a “go” may usally consist of 12 jets. Of those 12, there may be three formations. Therefore, we normally assign the numbers of those formations as a sequence, . 11-14, 21-24, and 31-34. Where there are multiple flying squadrons at a base, they assign each squadron a series of 3 numbers, 0-8. Therefore, the same number suffix should not be flying with more than one formation at a time. This is also helps controls and pilots recognize their callsigns on the radio, especially if the radio transmission is clipped. For example, if all that is understood was “(radio static) 71, descend and maintain 3 thousand”, one would still know that the message was for callsign 71 and not callsign 51. The “91” callsign suffix is usually reserved for “checkride” sorties.