Rishi: Traditionally associated with Viśvakarman hymnic tradition (ṛṣi-attribution varies in ancillary indices; often treated as cosmogonic/architectonic speech rather than a single personal seer).
Devata: Viśvakarman
Chandas: Triṣṭubh (probable; to be confirmed by metrical scan)
What, I pray, was the base; what was the point of grasp; in what wise was it done,—whence, when generating the earth, Viśvakarman, the all-seeing, by his might overspread the heaven?