Three codes were hidden in THE MIND PALACE RPE post on the Investigate Ingress blog.
[1] tioodwpfthbibclowot
[2] affomhlhxiirkflenpdeji
[3] agirsrtmnbgoixw.defnbtx
Code #1, #2 & #3
Observations
Well after playing around enough with the codes and not getting anything, the only thing left to do was to join them together