That is how his Honour put the matter to the jury; but the question of law remains, was the objection well taken that the contents of the label were inadmissible. So far as relevance to the issue goes, it is not easy to treat the contents as irrelevant. They formed part of the proof it was sought to give that the deceased's blood content showed that his behaviour, including the manner in which he attempted to board the train, was influenced or controlled by drink. The issue was whether he was thrown between the train and the platform, or was dragged there, by the negligent manner in which the train was started. His inability to control his movements properly was material to that inquiry. The only reason for rejecting the proof was that it involved the contents of a writing. No attempt was made to show that the jar or vessel was lost or destroyed or that the label had been removed or obliterated. The evidence as to the writing on the label was offered simply as part of the identification of the sealed container and on the footing that such evidence was not within the rule requiring the production of written documents or proof of the loss, destruction or other unavailability of the document before the tender of secondary evidence. In J. H. Wigmore's work on Evidence , 3rd. ed. (1940) vol. IV, s 1182, pp. 321-323, that learned writer dealt with the application of the rule to what he calls "inscribed chattels". He wrote: "It is impossible to say that any settled doctrine has found favour respecting the application of the rule to material objects, not paper, bearing inscriptions in words. This is because there are inherent difficulties. It is impracticable to base any distinction upon the material bearing the inscription; for a notice-board or a tombstone may deserve the application of the rule as well as a sheet of note-paper. Nor is it practicable to distinguish according to the number of words; for each number is but one higher than the preceding, and a broker's note of ten words or a baggage-check of a few initials may need inspection as much as a lengthy lease for ninety-nine years. Nor can the purpose of the words be material; for the memorandum-tick made for private verification may become as important as the deed intended for public registration. No Court seems to have attempted, and certainly no Court has achieved, a satisfactory test for the distinction to be drawn. There are precedents requiring and precedents not requiring production - precedents often entirely irreconcilable if one were seeking an inflexible rule. But there is no reason for making such a rule; the rational and practical solution is to allow the trial Court in discretion to require production of an inscribed chattel wherever it seems highly desirable in order to ascertain accurately a material fact." In spite of what the learned author says in the last paragraph, it cannot be satisfactory to leave the question of the admissibility of the proofs to the discretion of the judge at the trial. One can understand a judge as a tribunal of fact insisting on the production of an article and failing, if the party would not produce it, to feel the requisite degree of satisfaction that the material issue is proved. But that is another matter. The role excluding secondary evidence did not go beyond writing and include physical objects. "Where the question is as to the effect of a written instrument, the instrument itself is primary evidence of its contents, and until it is produced, or the non-production is excused, no secondary evidence can be received. But there is no case whatever deciding that, when the issue is as to the state of a chattel, e.g. the soundness of a horse, or the equality of the bulk of the goods to the sample, the production of the chattel is primary evidence and that no other evidence can be given until the chattel is produced in court for the inspection of the jury": per Lord Coleridge C.J. for the Court of Crown Cases Reserved in Reg. v. Francis [1] . This is true of a picture where the question is whether a photograph is a copy: Lucas v. Williams & Sons [2] . It is true of an article of clothing where the question is as to its manufactured condition: Hocking v. Ahlquist Bros. Ltd. [3] . It has been held too, that upon the trial of an indictment containing counts for an unlawful assembly, seditious combinations and the like, production was unnecessary of flags, banners and placards bearing seditious inscriptions and devices. Abbott C.J. for the Court of Queen's Bench said: "With respect to the last point, the reception of the evidence as to the inscriptions on the flags or banners, I think it was not necessary either to produce the flags or give notice to the defendants to produce them. The cases requiring the production of a writing itself will be found to apply to writings of a very different character. There is no authority to show that in a criminal case ensigns, banners, or other things exhibited to public view, and of which the effect depends upon such public exhibition, must be produced or accounted for on the part either of the prosecutor or of the defendants. And in many instances the proof of such matters from eye-witnesses, speaking to what they saw on the occasion, has been received, and its competency was never, to my knowledge, called in question until the present time. Inscriptions used on such occasions are the public expression of the sentiments of those who bear and adopt them, and have rather the character of speeches than of writings. If we were to hold that words inscribed on a banner so exhibited could not be proved without the production of the banner, I know not upon what reason a witness should be allowed to mention the colour of the banner, or even to say that he saw a banner displayed, for the banner itself may be said to be the best possible evidence of its existence and its colour": R. v. Hunt [4] . The decision is not considered sound by Wigmore (loc. cit.) and is treated by Parke B. in Jones v. Tarleton [5] , as meaning that the evidence of the inscriptions is received as part of the res gestae ; but it illustrates the distinction between physical things bearing written inscriptions and documents the written contents of which amount to what may be called an instrument or writing which, because of the significance of what it expresses, has some legal or evidentiary operation or effect material to the case. In the present case the purpose of offering the evidence was simply to prove that the sealed jar leaving the hands of Dr. Stratford Sheldon was the same sealed jar that came to the hands of Mr. McDonald. The proof depended upon the identity of the character and condition of the jar in all respects and most particularly its label. The statement upon the label that it contained the blood of the deceased, if that was what it stated, could not be used as evidence of that fact. But the identity of the writing on the jar in Dr. Stratford Sheldon's hand with what Dr. Stratford Sheldon stated that he wrote was an admissible evidentiary fact forming part of the description. It seems clear enough, on reading the evidence closely, that the label was pasted on the vessel so as to form part of its then condition and was not a mere detachable ticket. In other words, the vessel was an "inscribed chattel" of which the correct view is that the full description was admissible by oral proof for the purpose of identification.