[4] Peter's son Christopher was responsible for all the photographs that illustrate the book, and as was the case with those he took for the Gazetteer, they were taken especially, and form a visual journey of their own.
[11] Simpson and Westwood make references to Underwood's Haunted London in The Penguin Book of Ghosts (2008)[12] and The Lore of the Land (2006).
[13] Underwood would subsequently lament one entry in the book; one that concerned 'the appearance of the Vicar of Radcliffe Wharf' (included in the section covering the 'Isle of Dogs').
[14] Underwood's source material was a ghost story that had been written by Frank Smyth and published in Man, Myth & Magic, (part 105).
What particularly vexed Underwood was that, in their publication of the confession, The Sunday Times also cited the following line from Underwood's book: 'the appearance of the Vicar of Ratcliff Wharf is convincing and puzzling', whilst omitting the following words that precede it: 'If we accept the evidence of the four men'.