Deleting pictures from slides since last save

Please bear with me as I explain, hopefully succinctly, my question. I have a userform that, among other things, allows the user to insert a picture into a subset of sets in the project [i.e., slides 3-29 and 30-54]. I want to create a "Clear" subroutine that will, among other things, remove any inserted pictures from the slides subsequent to the last SAVE. My thinking is with each "insert" picture procedure, a public 2 dimension variable is created which contains the slide number and shape.ID pair. The clear routine will simply look through these variables, go to each slide and delete the picture. (Upon each SAVE theseeariables gets erased.

Is my logic sound? Should I be going down a different route? Having never worked with mulit-dimensional variables, how do I specify or read each variable pair's values to parse through them?

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