In the extract given above from what was styled Gourlay's "Last Sketch" of Upper Canada, the query and rejoinder, "Schools and Colleges, where are they? Few yet _painted_, though lectures on Natural Philosophy are now abundant"--will not be understood, without remark. The allusion is to an advertisement in the _Upper Canada Gazette_ of Feb. 5, 1818, which Gourlay at the time of its appearance thought proper to animadvert upon and satirize in the Niagara _Spectator_. It ran as follows: "Natural Philosophy.--The subscriber intends to deliver a course of Popular Lectures on Natural Philosophy, to commence on Tuesday, the 17th inst., at 7 o'clock p.m., should a number of auditors come forward to form a class. Tickets of admission for the Course (price Two Guineas) may be had of William Allan, Esq., Dr. Horne, or at the School House. The surplus, if any, after defraying the current expenses, to be laid out in painting the District School. John Strachan, York, 3rd Feb., 1818." As was to be expected, Dr. Strachan was a standing subject of invective in all the publications of Gourlay, as well as subsequently in all those of McKenzie. Collins, Editor of the _Freeman_, became, as we have seen, reticent in relation to him; but, more or less, a fusilade was maintained upon him in McKenzie's periodicals, as long as they issued. In McKenzie's opposition to Dr. Strachan there was possibly a certain degree of national animus springing from the contemplation of a Scottish compatriot who, after rising to position in the young colony, was disposed, from temperament, to bear himself cavalierly towards all who did not agree with him in opinion. In addition, we have been told that at an early period in an interview between the two parties, Dr. Strachan once chanced to express himself with considerable heat to McKenzie, and proceeded to the length of showing him the door. The latter had called, as our information runs, to deprecate prejudice in regard to a brother-in-law of his, Mr. Baxter, who was a candidate for some post under the Educational Board, of which Dr. S. was chairman; when great offence was taken at the idea being for a moment entertained that a personal motive would in the slightest degree bias him when in the execution of public duty.