Look after the genus of birds called Petrels they are very peculiar in their way of life, and are in the Atlantic; perhaps may enter the Streights. I am glad you begin to relish Linn.: there is nothing to be done in the wide boundless field of Nat. Hist. Without system. Now you are master of the ordines, you must attend to the genera, and make yourself well acquainted with the terms. Study well the introductions to the classes, and see how the terms are explained.