Śrīpura-Nirmāṇa-Prastāva (Inquiry into Śrīpura and its Construction) / “The Proposal to Build Śrīpura”
एकयोजनमुन्नद्धे कालायस विनिर्मिते / उभयोरर्गला चेत्थमर्धक्रोशसमायता
ekayojanamunnaddhe kālāyasa vinirmite / ubhayorargalā cetthamardhakrośasamāyatā
The door-leaves are strengthened to the measure of one yojana and wrought of black iron (kālāyasa). The bolts (argalā) on both sides are thus, extending to half a krośa.