In the night, in Khela's battle, a leg was severed like a wild bird's wing; straightway the Ashvins gave Vishpala a leg of iron so that she might move when the conflict opened. Other verses say they helped her 'seeking booty, powerless to move' in a battle of a thousand spoils, that they set her up again when Agastya praised them, and that in a moment they gave her power to move.
Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 1.116.15; Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 1.112.10; Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 1.117.11; Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 1.118.8; Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer § 10.39.8
Sayana and Griffith understand Vishpala as a woman, kin of a king Khela whose priest was Agastya, wounded in battle. Geldner and others read the same words as a mare in a prize race. Wikipedia's article sets out both.
An interpretation, not a second narrative.
Sources: Hymns of the Rigveda, tr. R. T. H. Griffith (1896), hymns read for the Vedic layer; Wikipedia: Vishpala
Chyavana is left behind on earth, decrepit and ghostlike.
The gods sacrifice without the Ashvins, who are held unclean for wandering among men as physicians.
Dadhyanch, son of Atharvan, knows the 'honey', the secret of making the sacrifice whole.
Ghosha has grown old unmarried in her father's house.
Dhaumya sends Upamanyu to tend the cows.
Prajapati gives his daughter Surya Savitri to King Soma; all the gods come as groomsmen.
Madri, childless, asks Pandu to ask Kunti to share her invocation.
Bhujyu is abandoned in the middle of the ocean.