In the year 1872, through the medium of the Natural History columns of “The Field,” a series of observations were made by naturalists in different parts of England on the subject of “Our Summer Migrants.” A form of calendar was distributed and filled up by each according to his opportunities. In this way, by the end of the year six hundred and forty-five separate observations were placed on record, and it devolved upon me to prepare a report from the statistics so furnished. As a good deal of interesting information was thus brought to light, it occurs to me that I may appropriately bring the present volume to a close by extracting so much of the report as relates strictly to the subject matter in hand, and I accordingly do so. In the calendars returned, some thirty species of summer migratory birds are mentioned with more or less frequency. The majority of the observations upon them have reference, as might be supposed, to the dates of their arrival and departure, or, more correctly speaking, to the dates when they were first heard or seen and last observed. When referring some time previously to the utilization of such observations, it was remarked that upon various points some addition to our knowledge was desirable. Amongst other interesting facts, for example, might be ascertained the precise line of direction in which various species migrate, the causes which necessitate a divergence from this line, the relative proportions in which different species visit us, the causes which influence the abundance or scarcity of a species in particular localities, the result of too great a preponderance of one species over another, whether beneficial or otherwise to man as a cultivator of the soil, the simultaneity or otherwise of departure from this country in autumn, the causes operating to retard such departure, and so forth. All these are matters of interest, especially to those who reside in the country, and have leisure to inquire into the subject. Let us see how far the observations supplied furnish a reply to these inquiries. Of the thirty species of migrants mentioned, the Swallow, as might be supposed, has attracted the largest share of attention, and in regard to the number of observations made upon it stands at the head of the list with forty-three. The Cuckoo comes next with thirty-eight; the Chiff-chaff and Swift follow with thirty and thirty respectively; and so on through the list, as given below, to the Reed Warbler, upon which bird, strange to say, no more than three observations were made. The following list will give some idea of the amount of attention which each bird received.