"Now, all you have to do is, immediately you have made your entry, to index it; and if you will only spare the time and patience and perseverance, to _cross index_ it. Thus under letter W you will write, 'Wales, Prince of, married in Robes of the Garter' (1023); under G, 'Garter, Robes of, worn by P. of W. at his Marriage' (1023); under F, 'W. P. Frith, R.A., present at the Marriage of P. of W.' (1023). Thus also, 'Verdi, Victor Emmanuel,' and 'Italy' will be indexed under their respective letters 'V' and 'I,' and be referable to at the number (1024). I have one common-place book that has been 'cooking' ever since 1858, and is not half finished yet. The last entry is numbered (5068), and refers to Sir Thomas Roe, Ambassador from James the First of England to the Emperor Jehan Guize, commonly called the Great Mogul. The number (5068) is referred to under the letters R (for Roe), J (for James I.), J (for Jehan Guize), M (for Mogul), and A (for Ambassadors). By means of a rigidly pursued system of indexing and _cross indexing_ (so earnestly recommended by Henry Brougham) you can put your hand at once on the information bearing on the particular subject which claims your attention." Mr. Sala also said:--"I believe this system strengthens and disciplines the memory, and keeps it green. It is a very good mental exercise to read a page or two of the index alone, from time to time. You will be astonished at the number of bright nuggets of fact which will crop up from the rock of half forgetfulness. Finally, never allow your index to fall into arrear, and write the figures in your circumscribed spaces in red ink. The corresponding ones in the index may be in black." It was from this mine of literary nuggets that he used to obtain the materials for his charming papers which amused and instructed the reader. Another celebrated modern journalist and author is Mr. Andrew Lang. He is just the contrary of Mr. Sala in his methods of work. Mr. Lang seems to pride himself on the fact that he has no other aid to writing except an excellent memory. He does not trouble himself about books of reference, and says he has not one of any sort, not even a classical dictionary, in his house. Mr. Lang is certainly a clever writer, and manages to produce much pleasant reading, but his contributions to the magazines and newspapers lack the interesting facts which Mr. Sala placed so pleasantly before the public in his racy and able articles. Mr. Lang devotes his mornings to writing books and magazine articles, and the afternoons to penning leaders for the newspapers. The Earnings of Authors.