I will teach this in my Ragtime and Blues Lesson Load https://www.daddystovepipe.com/ragtime-and-blues.php
John James tape-recorded this on the LP “Sky In My Pie”, an LP he shares with Pete Berryman (most pieces are duets). It finally has actually been reissued on cd, together with 3 other John James’ LP’s; so you get four LP’s on a 2 cd-set for only ₤ 9.99 Get it here (definitely suggested) https://www.bgo-records.com/product/bgocd1301-morning-brings-the-light-john-james-sky-in-my-pie-with-pete-berryman-head-in-the-clouds/

Mammy O’Mine words by William Tracey, music by Maceo Pinkard, 1919
Standard tuning, capo II.
I’m playing a Arrenbie archtop guitar (15″ mahogany body, moonspruce top) https://www.arrenbieguitars.be/