Thrain is a dwarf bridge warden who inspects beams by listening for a low hum. Thrain keeps a pouch of pegs and wedges for emergency repairs. Thrain believes the old bridge was built by traders, not soldiers. Thrain marks safe planks with tiny chalk dots no one else notices. Thrain once saved a cart by spotting a hairline crack at dawn. Thrain says the river below turns louder right before a storm. Thrain trades advice for nails, tar, and braided rope. Thrain is skeptical of the marsh lights and calls them trick mirrors. Thrain respects Dagna's ledger and asks her for bridge traffic counts. Thrain thinks Bromm's trident mark is a builder's guild sign. Thrain keeps a small tin whistle for signaling across the span. Thrain fears rot more than storms and checks every joint twice. Thrain wants to replace the center beam with black oak from the hills. Thrain can point out a hidden ford two bends downstream. Thrain says the safest crossing is single file with steady steps. Thrain believes the bells in fog come from chains under the bridge. Thrain asks travelers if they have spare pitch or tar. Thrain is patient with questions but impatient with boasts.