Rot a peck of pa's malt

• peck of malt → peck of pa's malt
  • A first-draft version of Finnegans wake

• Joyce's letter to Harriet Shaw Weaver of 15 November 1926: "Willy brewed a peck of maut; Noah planted the vine and was drunk"
  • Willie Brewed a Peck o' Malt: a song composed by the Scottish poet Robert Burns in the gardens of a house on the site of the Coach House in Waterside, Moffat, Dumfriesshire. The song celebrates whiskey as well as beer. Whiskey and beer are "twins"

• rot ... pa's malt: HCE's rotten urine in the commode's (commodius in line 2) chamber-pot recycles the alcohol that he has drunk → thus this, the sixth of seven clauses in the second paragraph, corresponds to "commodious vicus of recirculation" in the first paragraph → the 6th of 7 elements in a second circuit of HCE's bedroom

• pecker: penis