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 1 1| appertain: further, from what cause it arises that they are
 2 1|       dream is, and from what cause sleepers sometimes dream,
 3 1|       those also of which the cause lies in supra-human agency,
 4 2|   proceed to inquire into the cause why one sleeps and wakes,
 5 2|   sense, nor from some chance cause, but when, as has been just
 6 2|        We must next state the cause to which it is due, and
 7 2|    there are several types of cause (for we assign equally the "
 8 3|    that this affection is the cause of the embryo’s remaining
 9 3|       its centre], due to the cause above mentioned. Hence restless
10 3| cooling while the things that cause sleeping are themselves
11 3|        We have now stated the cause of sleeping, viz. that it