Throughout the commentaries, the editorial alertness to questions of versification, sometimes occasioned by the need to investigate the rightness of a reading, is welcome. The commentaries are also valuable for their tracking of sources and analogues, a tracking that makes good use of Chadwyck-Healey's Lion database. The editors adhere admirably to the cogent principles which they set out in their 'Editorial Overview'. These principles may be summarised as follows. It means that published and unpublished material is not intermingled, as it is, quite deliberately, in the Longman edition.
Appropriate licence seems to be given the editors by 'intended to publish' and 'hoped to issue'.
I wondered how the alternative versions of 'Mont Blanc' and 'Hymn to Intellectual Beauty' in the Scrope Davies Notebook will be treated. These versions appear to be finished and, arguably, they were 'released' to a friend in that it appears that Shelley lent the notebook to Byron. I assume they will fall into the last group described in my next sentence. Obvious errors are corrected. Further historical collations are given at the back of the book.