regular newspaper warfare:-- BY John Yarwell and Ralph Sterrop, Right Spectacles, reading and other optic glasses, etc., were first brought to perfection by our own proper art, and needed not the boasted industry of our two apprentices to recommend them to the world; who by fraudently appropriating to themselves what they never did, and obstinately pretending to what they never can perform, can have no other end in view than to astonish the ignorant, impose on the credulous, and amuse the public. For which reason and at the request of several gentlemen already imposed on, as also to prevent such further abuses as may arise from the repeated advertisements of these two wonderful performers, we John Yarwell and Ralph Sterrop do give public notice, that to any person who shall think it worth his while to make the experiment, we will demonstrate in a minute’s time the insufficiency of the instrument and the vanity of the workmen by comparing their miraculous Two-Foot, with our Three and Four Foot Telescopes. And therefore, till such a telescope be made, as shall come up to the character of these unparalleled performers, we must declare it to be a very impossible thing. Then the old-established and indignant masters proceed to recommend their own spectacles, perspectives, &c., in more moderate terms than were employed by their late apprentices, but still in an extremely confident manner. This appeared for several days, and at last, on April 25, elicited the following reply:--