Let our observer now direct his telescope to the star [epsilon] Lyrae. Or rather, let him first closely examine this star with the naked eye. The star is easily identified, since it lies to the left of Vega, forming with [zeta] a small equilateral triangle. A careful scrutiny suffices to indicate a peculiarity in this star. If our observer possesses very good eye-sight, he will distinctly recognise it as a "naked-eye double"; but more probably he will only notice that it appears lengthened in a north and south direction.[4] In the finder the star is easily divided. Applying a low power to the telescope itself, we see [epsilon] Lyrae as a wide double, the line joining the components lying nearly north and south. The southernmost component (the upper in the figure) is called [epsilon]^{1}, the other [epsilon]^{2}. Seen as a double, both components appear white. Now, if the observer's telescope is sufficiently powerful, each of the components may be seen to be itself double. First try [epsilon]^{1}, the northern pair. The line joining the components is directed as shown in Plate 3. The distance between them is 3".2, their magnitudes 5 and 6-1/2, and their colours yellow and ruddy. If the observer succeeds in seeing [epsilon]^{1} fairly divided, he will probably not fail in detecting the duplicity of [epsilon]^{2}, though this is a rather closer pair, the distance between the components being only 2".6. The magnitudes are 5 and 5-1/2, both being white. Between [epsilon]^{1} and [epsilon]^{2} are three faint stars, possibly forming with the quadruple a single system. Let us next turn to the third star of the equilateral triangle mentioned above--viz. to the star [zeta] Lyrae. This is a splendid but easy double. It is figured in Plate 3, but it must be noticed that the figure of [zeta] and the other nine small figures are not drawn on the same scale as [epsilon] Lyrae. The actual distance between the components of [zeta] Lyra is 44", or about one-fourth of the distance separating [epsilon]^{1} from [epsilon]^{2}. The components of [zeta] are very nearly equal in magnitude, in colour topaz and green, the topaz component being estimated as of the fifth magnitude, the green component intermediate between the fifth and sixth magnitudes. We may now turn to a star not figured in the map, but readily found. It will be noticed that the stars [epsilon], [alpha], [beta], and [gamma] form, with two small stars towards the left, a somewhat regular hexagonal figure--a hexagon, in fact, having three equal long sides and three nearly equal short sides alternating with the others. The star [eta] Lyrae forms the angle next to [epsilon]. It is a wide and unequal double, as figured in Plate 3. The larger component is azure blue; the smaller is violet, and, being only of the ninth magnitude, is somewhat difficult to catch with apertures under 3 inches. The star [delta]^{2} Lyrae is orange, [delta]^{1} blue. In the same field with these are seen many other stars.