The 20th of May was a day of rest for the men and animals of our party; but of rather hard work for the two botanists, who were for eight or nine hours busily engaged in putting their collections into order, and transferring the specimens from damp to dry paper. The system of ventilating gratings which we adopted, works admirably in a dry climate, and especially when it is possible to expose the parcels to sunshine; and in such conditions most plants may be dried without a single change of paper. The case is different when, owing to rain, or the dampness of the climate, the paper cannot be well dried, and the plants have to be laid in in a more or less moist condition. Artificial heat may sometimes be applied; but this is rarely available for travellers in such a country as Marocco. It was necessary to interrupt the work during the forenoon, in order to pay a visit to the Governor. This was no matter of mere ceremony, as it was essential to obtain his consent and assistance towards carrying out the design—on which we had fixed our hearts—of penetrating to the head of the Amsmiz valley, and climbing some one of the higher adjoining peaks. We knew, indeed, that in this part of the range, the Great Atlas does not attain so high a level as it does farther east; but as the summits must reach a height of fully 11,000 feet, they could not fail to exhibit the characteristic vegetation of the higher zone, and at the same time, unless we were again pursued by bad weather, command a wide view over the unknown country, on the south side of the chain.