Abhidhamma Kathātvatthu is the sophisticated high-level Dhamma explaining compatibility of things: Khandha, Āyatana, and Dhātu.
Colophon:
[The writing of this manuscript] was completed in the evening, the fifth day of the week. My handwriting was not beautiful. It is readable on the lines. Please do not blame me! Please read it carefully. I lost my concentration because I wanted to disrobe. I cannot help being distracted when seeing young girls. I, Monk Dhammavuḍḍhi, wrote this manuscript while taking care of Sawathu Cao Buddhavaṃsa at Wat Ban Hong Tai, to fulfill his intention in CS 1207, a dap sai year. May this merit support and protect myself and my family members. [The writing of this manuscript] was completed in the middle of rainy season, on the tenth waning-moon day of the tenth [lunar] month.
I, Phi (brother) Thu, wrote the manuscript during my monkhood at Wat Ban Hong. I desire to disrobe regardless of being forbidden.
Other notes:
This date corresponds with Friday, 26 Sepember 1845 (1207 Bhadrapada 25).