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http://en.wikipedia.org/wiki/Finnegans_Wake#Anna_Livia_Plurabelle_.28ALP.29

Patrick McCarthy describes HCE's wife ALP as "the river-woman whose presence is implied in the "riverrun" with which Finnegans Wake opens and whose monologue closes the book. For over six hundred pages, however, Joyce presents Anna Livia to us almost exclusively through other characters, much as in Ulysses we hear what Molly Bloom has to say about herself only in the last chapter."[143] The most extensive discussion of ALP comes in chapter I.8, in which hundreds of names of rivers are woven into the tale of ALP's life. Similarly hundreds of city names are woven into "Haveth Childers Everywhere", the corresponding passage at the end of III.3 which focuses on HCE. As a result it is generally contended that HCE personifies the Viking-founded city of Dublin, and his wife ALP personifies the river Liffey, on whose banks the city was built.

That's the sausage.