A document giving evidence as to the existence or contents of another, missing document.
'It can form one of the (at least) two adminicles of evidence that must exist before it can hold that the person who committed the crime was the accused.'
((n.) Help or support; an auxiliary.|--|(n.) Corroborative or explanatory proof.|--|)
Origin:
Mid 16th century: from Latin adminiculum ‘prop, support’.