The first one is mad alice lane. It is marked on the Low Petergate end, but not on the swinegate end.
Snickelway 11 - Mad Alice Lane
Snickelway 12 - Hornpot Lane
This snickelway looks to be part of Poundland, but is a super snickelway that leads to Holy Trinity church. It is closed on Sundays and Mondays (according to the book) but the day I tried it was originally locked as it was Monday, but later on near lunch time, it was open!
Holy Trinity is well worth a look. It has some interesting features - including the original boxes for pews. There are guides which are very helpful and provide lots of information about the church.
Snickelway 13 - Tonge's Court
This is the pathway from the Holy Trinity Church to the street (Goodramgate - named after Gutheran - 12th Century).