“The credit which has been denied to photography on the score of art capacity must be conceded to its literal fidelity in rendering facts. That it is not imaginative, that it cannot modify or omit details from its presentments, becomes, in many cases, its cardinal virtue. If it nothing extenuate, it sets down naught in malice, and when it enters the witness-box, its evidence leaves little room for doubt. Hence it has taken an important place as an auxiliary to the administration of justice, both in civil and criminal cases. In multiplying indisputable fac-similes of important documents, in indicating pictorially the relative positions of disputed territory, its use is obvious. But it is in its aid to the discovery of identity in persons charged with crime that its legal use is most important …” … More Tricks of the prison limner and sitter 1866