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first of the heavenly bodies to which Herschel really turned his eyes with the longing of a traveller in an untrodden land of romance, appears to have been the planet Saturn. He was then forging the instruments which were destined to disclose the hidden things of creation, and to give an impulse to the study of them, that has gone on from wonder to wonder till the present day. He was keeping a journal, making entries of what he saw, and laying a foundation for future progress. But his method of writing was somewhat peculiar. His papers were to a large extent copies of entries made in his journal, or the impressions he received at the moment while sun or star or planet was under his eye. There was thus room for mistakes, which it is not surprising that he fell into; the wonder is that he fell into so few. Of mistakes resulting from this hasty method of working he was himself conscious; but it led to another inconvenience. He did not delay publishing his views till he was perfectly sure of their accuracy. The result was diffuseness of statement and unnecessary returning to the same subject. To give his views in the order of time would thus be wearisome and useless. We shall keep to the order of subjects, bringing them, as far as possible, to a focus.