Hi David, Maisie is a Great Northern Atlantic, it was named Maisie after an LNER official F.E. Williams' daughter. I don't know if the book contains enough information, but the book has been reprinted a few years ago and is allegedly very complete.
Regards Nick.
P.S. referenced from Brian Hollingsworth book; LBSC His Life and Locomotives.
Edited By Nicholas Farr on 08/05/2021 08:42:04