_Mary Queen of Scots._--In the _Gentleman's Magazine_, vol. xcix. part ii. p. 77., it is stated that the late Earl of Buchan (who died in April, 1829) "in some letters warmly embraced the cause of Mary Queen of Scots against Dr. Robertson;" but we are not informed whether they were ever printed, or where they are to be found. As I have always felt a strong conviction of the injustice done this unfortunate woman, I shall be gratified by any communication stating where these letters can be met with. F. R. A. _Heuristisch--Evristic._--The word _heuristisch_ occurs four times in the _Kritik der Reinen Vernunft_, pp. 480. 515. 520. 568., ed. Leipzig, 1838. I cannot find it in any German Dictionary. Mr. Haywood (ed. 1838) translates it _evristic_, which I cannot find in any English dictionary. I conjecture that it may be [Greek: heuriskô] Germanised, and that it will bear the translation _tentative_. Will some one, better versed than myself in the language of German metaphysics, tell me whether I am right, and, if not, set me so? H. B. C. U. U. Club. Minor Queries with Answers. _"Eugenia," by Hayes and Carr._--Can any of your readers give me any account of the following play, as to where the scene of it is laid, &c.? _Eugenia_, a Tragedy, by Samuel Hayes and Robert Carr, 8vo. 1766. This play, which appears to have never been acted, was written by the Rev. Samuel Hayes, author of several of the Seatonian prize poems, and who was at one time usher in Westminster School. Robert Carr, who assisted him in writing it, appears to have been one of the Westminster scholars about 1766, but I am unable to give any further account of him. A. Z. Glasgow. [The scene, as stated at the commencement of the play, was laid in and near the Mercian camp, on the confines of Wales, except the first act, and beginning of the third, which lies in the British camp, distant from the Mercian eight miles. The _dramatis personæ_ were:--_Britons_: Cadwallyne, king of the Britons; Ormanus, a noble captive; Albanact, Eliud, Edgar, officers; Eugenia, Althira, captives. _Mercians_: Penda, king of Mercia; Ethelred, his son; Osmond, nephew to the king; Offa, Egbert, Edwin, officers. British and Mercian officers, prisoners, guards, and other attendants.] _Claret._--How, or from whence, have we adopted the word _Claret_, as applied to the wines of the Bordeaux district, and which seems to be utterly unknown in other parts of Europe? VINOS. [Dr. Pegge, in his _Anonymiana_, cent. iii. sect. 57., says, "There is a place of the name of _Claret_ in the Duke de Rohan's _Mémoires_, lib. iv., from whence I conceive the French wine takes its name." It is stated in the _Mémoires_ as being five miles from Montpellier.] "_Strike, but hear me._"--On what occasion, and by whom, were these words first used? I have not been able to trace them. ABHBA.