I wouldn't sail this ship if I were you
-8911.1 Those in familar places
–8911.11 In your home, but there are extra rooms
–8911.12 In some educational venue
—8911.121 In which you are late for an exam
—8911.122 In which you unaccountably appear to be missing clothes
–8911.13 Those in which you need to find a toilet, but cannot go when you find one
–8911.14 Those in which you are entrusted with some solemn responsibility
—8911.141 In which you mess this responsibility up
—8911.142 In which for some reason you appear to be evil
–8911.15 In your place of work, in which you are, unremarkably, doing work
—8911.151 Set inside a virtual-reality flat which you did not realise was hidden in your simulation code
-8911.2 Those in locations from song and story
–8911.21 Those that mix fictional characters with people who you know, and nobody involved thinks that this is odd
-8911.3 Those in entirely unfamiliar places
–8911.31 Dreams of vast snowfields, forgotten mountains and the edge of the world
–8911.32 Those that feature huge buildings built by architecture cut and paste, and there are great sunlit libraries on the upper floors and vast candlelit theatres below
–8911.33 Those that feature mysterious staircases up or down
-8911.4 Those that involve flying
–8911.31 Flying without any extra devices
—8911.311 Those where you can lift up your legs at the knee and fly over the autumn fields
–8911.32 Flying in aeroplanes
—8911.321 Those where large aircraft fly close to the ground without any seeming alarm, darting under bridges with consummate ease
-8911.5 Those of short duration
–8911.51 Tiny dreams that fit into tiny sleeps, barely noticeable save for a lingering sense of nonsense
-8911.6 Those that fold in on themselves
–8911.61 Dreams that end with a dream of waking up
–8911.62 Those dreams that involve a realisation that one may be dreaming, and a check thereof
—8911.621 Dreams that fail the dreaming test but are nevertheless still dreams
-8911.7 Those that have disappeared
–8911.71 Dreams which you know you could remember on waking, but can remember no longer
–8911.72 Dreams which leave you only with a vague waking memory itch
