The Old Irish legal texts and the Middle Irish commentaries award a range of different body-fines for mild injuries. These differences are the result of a recoverable process of historical development. We can sort the various texts and commentaries chronologically. The earliest recorded stage appears to include a three-sét fine for an injury that caused bruising or swelling or loss of skin (but not all three). This fine is found in the text edited here under the title Di Ércib Fola. An edition is also offered of the commentaries to that text. The best witness for these commentaries is a composite text, which consciously combines two distinct commentary traditions. These commentaries discuss the size of the body-fines for various injuries, the honour-price fractions paid along with those fines, the defining characteristics of the injuries, payments for medical expenses, and court procedure in cases of assault.