Yes you are right because I was doing the dose that night and did a bit on it and you said you wished you had realised earlier in the day as it would have stopped a wasted trip to the post office.
Mary Jane shoes are they the same as I startrite shoes for children up to about 10 or 11
Black patten leather with a strap to hold the shoe on your foot.
I found out later that my foot needs a "combination last," a pattern for building the shoe that has a narrow heel and normal front where the toes go.
Without the strap I would walk out of the shoes due to my narrow heel.
Then I found Naturalizer brand which used to have a narrow heel.