The biographers of Linnæus have often mentioned the Journal of his Lapland Tour, to which he himself has frequently adverted, in various parts of his voluminous works, under the title of _Lachesis Lapponica_. The publication of this Journal has been anxiously desired; and so valuable was the manuscript considered, that on his whole collection and library being sold, after the death of his son, it was remarked that these papers at least ought to have been retained in Sweden, as a national property; the journey which they record having been undertaken at the public expense, and the objects illustrated thereby being, necessarily, more important to the author's countrymen than to any other people. This remark, however, was not made till long after the manuscript, with all the treasures which accompanied it, had escaped, by land and by sea, the pursuit instituted by the Swedish monarch to recover them, and had reached England in safety. It became a duty for their fortunate possessor to render them useful. To place the authority of this collection, as far as possible, out of the reach of accident, he has made it his chief object to extend any information to be derived from it, not only to his own countrymen, but to his fellow-labourers in every quarter of the globe. The Banksian herbarium was, in the course of seven months, compared with that of Linnæus throughout, to their mutual advantage, by a copious interchange, not only of information, but of specimens. Plants or insects were for many years continually sent from France, Switzerland, Italy, Spain, Germany, and even Sweden, as well as from America, for comparison with the authentic originals named by the hand of Linnæus. The time and labour devoted to this task have been richly compensated, by the acquisition of various novelties, and of much instruction, as well as by the pleasure of so extensive an intercourse with persons occupied in the same favourite and delightful pursuit, and by the acknowledgements with which most of them have overpaid the trouble.