When a charge is entirely hidden by another charge or ordinary being placed upon it, the concealed item is said to be absconded.  In all manners the absconded charge is considered to be present and is emblazoned as if it were.The most common source of absconded charges is likely from Augmentations received after the original coat of arms was awarded.   Augmentations are awarded by the sovereign to distinguish the bearer for some exceptional service to the crown.