Enclosures may be classified thus: FIRST, catalogues, price lists and detailed descriptive matter—to inform the prospect of the goods; SECOND, testimonials and guarantees—to prove the claims made for the goods; THIRD, return postals, addressed envelopes and order blanks—to make it easy for the prospect to buy the goods
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The enclosure is to the letter what the supporting army is to the line of attack. It stands just behind the men at the front, ready to strengthen a point here, reinforce the line there, overwhelm opposition finally with strength and numbers.
A clever sales letter may make the proper impression, it may have all the elements necessary to close the sale, but it is asking too much to expect it to handle the whole situation alone.
The average prospect wants more than he finds in a letter before he will lay down his money. The very fact that a letter comes alone may arouse his suspicions. But if he finds it backed up by accompanying enclosures that take things up where the letter leaves off, answer his mental inquiries and pile up proof, the proposition is more certain to receive consideration.
The whole principle of right use of enclosures is a matter of foreseeing what your man will want to know about your proposition and then giving it to him in clear convincing form and liberal measure. But enclosures must be as carefully planned as the letter itself. They are calculated to play a definite part, accomplish a definite end and the study of their effect is just as vital as the study of step-by-step progress of letter salesmanship.
Some letter writers seem to think that the only essential in enclosures is numbers and they stuff the envelope full of miscellaneous folders, booklets and other printed matter that does little more than bewilder the man who gets it. Others make the mistake of not putting anything in with the letter to help the prospect buy. Neither mistake is excusable, if the writer will only analyze his proposition and his prospect, consider what the man at the other end will want to know—then give him that—and more.
And in order to live up to this cardinal rule of enclosures, simply confine your letter to one article. Seven of the best letter writers in the country have made exhaustive tests with descriptive folders. They have found that one descriptive circular, with one point, and one idea pulls where the multiplicity of enclosures simply bewilders and prejudices the reader. These men have conclusively proved that overloaded envelopes do not bring results.
In general the enclosure has three purposes: first, to give the prospect a more complete and detailed description of your goods; second to give him proof in plenty of their value; third, to make it easy for him to buy. On this basis let us classify the kinds of enclosures; that is, the mediums through which these three purposes may be accomplished.
The first, the detailed description, is usually given in catalogue, booklet or circular, complete in its explanation and, if possible, illustrated. Supplementing the catalogue or booklet, samples should be used whenever practicable for they help more than anything else can to visualize the goods in the prospect's eyes.