Wallhall

• Valhalla: in Norse mythology, the afterlife where those slain in battle feast, fight, and prepare for Ragnarok, or the end of the world, when they will fight on the side of Odin

• Walhall: (German) German form of Valhalla; Wotan's fortress in Richard Wagner's operatic tetralogy Der Ring des Nibelungen

• Wall hall → a gallery?

• Pall Mall: a street in London

Commentary

"(what with the wallhall's horrors of rollsrights, carhacks, stonengens, kisstvanes, tramtrees, fargobawlers, autokinotons, hippohobbilies, streetfleets, tournintaxes, megaphoggs, circuses and wardsmoats and basilikerks and aeropagods and the hoyse and the jollybrool and the peeler in the coat and the mecklenburk bitch bite at his ear and the merlinburrow burrocks and his fore old porecourts, the bore the more, and his blightblack workingstacks at twelvepins a dozen and the noobibusses sleighding along Safetyfirst Street and the derryjellybies snooping around Tell-No-Tailors' Corner and the fumes and the hopes and the strupithump of his ville's indigenous romekeepers, homesweepers, domecreepers, thurum and thurum in fancymud murumd and all the uproor from all the aufroofs, a roof for may and a reef for hugh butt under his bridge suits tony)" — FW 005.30-006.07

This passage in parentheses seems to represent the various noises of morning rush-hour in Paris (where Joyce wrote FW) and Dublin (where the novel is set), as though the window or curtain (in Joyce's apartment in Paris and in HCE's bedroom in Dublin) is opened at this point, allowing the street noises to "invade" the narrative.