I have little more of interest to relate. Years had sped on at Santo Domingo; and the time approached when I should be set free from the worries and responsibilities attending the supervision of gold-mines, the products of which were just at that tantalising point, on the verge between profit and loss, that made their superintendence a most irksome and anxious duty. The difficulty of the task was vastly increased by the capital of the company having been originally wasted in the erection of machinery that proved to be useless; so that financial questions constantly retarded the completion of the works. This book has not been written, however, to tell the story of the struggles of a mining engineer; and I turn aside with pleasure from this slight digression to say what little more I have to tell of my natural history experiences. I did not, until near the conclusion of my stay, commence collecting the skins of birds, contenting myself with watching and noting their habits. I obtained the skins of ninety-two species only; but small as this collection was, it proved an important addition to the knowledge of the bird-fauna of Nicaragua. The eminent ornithologist, Mr. Osbert Salvin, published in the "Ibis" for July 1872 a list of seventy-three species that I had up to that time sent to England. Altogether, only one hundred and fifty species, including those that I had collected, were known from Nicaragua. Fragmentary as our knowledge is, it is sufficient, in Mr. Salvin's opinion, to indicate, with tolerable accuracy, to which of the two sub-provinces of the Central American fauna the forest region of Chontales belongs. The birds I sent to England proved nearly conclusively that the Costa-Rican sub-province included Chontales in Nicaragua, and that the boundary between it and the sub-province of Southern Mexico and Guatemala must be sought for more to the north-west.