Vibhaṅga is the sophisticated high-level Dhamma explaining various classifications: Pañcakkhandha (Five Aggregates), Āyatana (Twelve Spheres), the six Dhātu (Six Elements), the eighteen Dhātu (Eighteen Elements), Ariya Sacca (Four Noble Truths), and Indriya (Twenty-two sense-faculties), followed by explanations comparative to human life.
Colophon:
[The writing of this manuscript] was completed in the evening. I, Novice Paññā, inscribed this manuscript during my stay of assistance to Svādhu Gambhīra of Wat Si Phin Chai in CS 1283, a ruang rao year, on the fifteenth waxing-moon day of the eleventh [lunar] month, the fifth day of the week as the Mon say, , a ka pao day as the Tai say, the twenty-third propitious time.
Sudinnaṃ vatta me dānaṃ dhammadānaṃ nibbānaṃ paramaṃ sukkhaṃ dhuvaṃ dhuvaṃ
The principal initiator was Police Sergeant Bunpan, together with his wife and his children, who sponsored the writing of this manuscript entitled Abhidhammā-vibhaṅga, so that Buddhism could be prolonged until [the end of] 5,000 years.
Other notes:
This date corresponds with Thursday, 18 August 1921 (183 Sravana 15).