When a complaint has been investigated, everything possible should be done to remove the cause, and to guard against a similar complaint in the future. The seemingly little precautions count for much. In the matter of changes of address, for instance, it is a small matter for the one who makes the change to see that it is made not only on the ledger but on the sales list, the collection card, and in every place where the address is permanently recorded. Failure to make the change in one place may lead to endless confusion. _Stenographer's Reference Index._ Here is a suggestion for the special benefit of the stenographer. Keep in your desk a reference index of names, addresses, and telephone numbers. There are certain persons and firms to whom your employer frequently writes letters. These are not in reply to letters, but are written in the usual course of business. The names of these persons should be on your index so that when you are told to write to Mr. Hunter or Mr. Roberts you will not be obliged to ask the address. Probably your employer will not ask you to keep such an index, but surely will appreciate your knowing the addresses. When he finds that you always know the telephone numbers of the printer, the bank, and other local houses with whom he does business regularly, as well as the addresses of prominent out-of-town correspondents, he will at least not place it to your discredit. But do not keep the addresses on sheets of paper that surely will soon become confusing on account of changes and additions which make an alphabetical arrangement impossible. Ask for a small card tray, holding 3"×5" cards, that will go in the drawer of your desk, a set of alphabetical indexes, and a supply of blank cards. Such an outfit can be bought at any first-class stationer's for a dollar or two. When you want to preserve an address, write it on a card, and file it alphabetically. If your employer will not supply the outfit, cut slips of paper and indexes to fit one of the small compartments in the desk drawer. Have the index, even if you must devise your own method of keeping it; you will at least have the satisfaction of saving many minutes of your time. And in the formation of a systematic habit you will be adding to your equipment. =Making Corrections.= All stenographers make mistakes, and no correspondent is entirely free from faulty dictation, which necessitates corrections in letters after they are written. But the time of the stenographer and, incidentally, expense to the house, can be saved if the correspondent will exercise reasonable care in indicating the corrections to be made.