_The Olympic Plain_ (Vol. ix., p. 270.).--I have just seen, in examining the contents of a German periodical, that in May, 1853, a proposal was submitted to the public by Professor Ross, of the University of Halle, for setting on foot a subscription to defray the expense of making excavations in Olympia, thus anticipating, by nearly a year, a recent suggestion to the same effect in "N. & Q." Professor Ross expatiates at considerable length (see _Jahrbücher für Philologie und Pädagogik_, vol. lxviii. p. 203.) on the advantages to be derived, as regards the arts, the literature, and the history of Greece, from the exploration of so celebrated a spot; but, notwithstanding all his arguments and eloquence, the amount of the subscriptions, after the lapse of nine months, only amounted, in February, 1854, to about 38l. As this sum was so utterly inadequate for the object intended, it was resolved to devote it to excavations in Mykenæ. Professor Ross takes occasion to pay a high tribute of praise to Lord Aberdeen, for the service rendered by his Lordship in discovering the treasury at Mykenæ. The facilities at Olympia for carrying on excavations are stated by Professor Ross to be very great. It is but a few miles distant from the sea, on the banks of a navigable river, and opposite to the very populous island of Zante; so that workmen, and means, and helps of all kinds can easily be procured. It was intended to give the superintendence of the excavations to Professor Alexander Rizo Rangabe, of the University of Athens, who was to be supplied with an adequate staff of artists, &c. Whatever discoveries might be made, were to become the property of the Greek nation. Travellers were to be permitted to visit the excavations during their progress, and to see all that was going on; and it was thought that a considerable number might be attracted to the spot, as the Austrian steamers convey passengers weekly in three or four days from Trieste to the western coast of the Morea. J. MACRAY. _Encyclopædia of Indexes, or Table of Contents_ (Vol. ix., p. 371.).--Your correspondent THINKS I TO MYSELF inquires respecting the desirableness and practicability of forming an "Encyclopædia of Indexes, or Tables of Contents." It was to meet this want (which is very commonly felt) that the publication of the _Cyclopædia Bibliographica_ was undertaken. The work has met your approval, and I have the pleasure of announcing that the volume will be completed on June 1. I think it will meet the desire of your correspondent and many others, who, "in reading up on any subject, wish to know whether any author treats upon it, without being obliged to examine his works, at a great expense of time and labour." JAMES DARLING.