Thanks for those hints.
Re the snake, goblin and (w|r)ingwraith room,
Click here to view the secret text
×I did it by getting the snake to leave a one-square gap along the east side of the pit, otherwise it goes north alongside the pit and traps you along the east wall.
Re the eyeballs: I see I had more than one incorrect assumption.
Room solved! Hold solved! Deleted scenes examined (one solved, two given up on).
BUT: only 1 of the three scroll riddles on level 7 solved. For me, the riddle in 2N1E was the easy one; I gather that other people found that one hard and 2N1W or 2N easy.
Thank you, "
jdyer"
, for a great hold. I'm rating it as a 10 (with difficulty 9).
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-- Chris[topher] Chittleborough