- Beards and bedsteads! (332) - trochaic
- Horns and halibuts! (345) - mixed (troche + dactyl)
- Bulbs and bolsters! (346) - trochaic
- Whistles and whirligigs! (347) - dactylic
- Soup and celery! (357) - mixed
- Thimbles and thunderstorms! (360) - dactylic
- Lobsters and lollipops! (361) - dactylic
- Giants and junipers! (365) - dactylic
- Tubs and tortoiseshells! (372) - mixed
- Bottles and battledores... (377) - dactylic
- ...bilge and beanstalks... (383) - trochaic
- Cobbles and kettledrums! (384) (in thought) - dactylic
- Wraiths and wreckage! (385) - trochaic
- Weights and water-bottles! (395) - trochaic
- Crows and crockery! (403) - mixed
I didn't notice much connection between the exclamation and the surrounding passage, with one rather significant exception. When Aslan confronts Trumpkin, we get: 'Wraiths and wreckage!' gasped Trumpkin in the ghost of a voice. So here we have alliteration both on the R sound and also on the hard G, and then the two alliterative pairs are connected semantically, if you will, with wraith and ghost. I think this emphasizes the devastation Trumpkin experiences in encountering the very Lion in which he disbelieved. One might say this is the last gasp of his former Aslan-free life; his disbelief has been wrecked on the body of Aslan, and if the smug skepticism at the center of his being has been killed, there may be nothing left of it but a ghost or wraith.
Edition:
C.S. Lewis. The Chronicles of Narnia. 1st American ed, HarperCollinsPublishers, 2001.