When, however, the owner of some such sheets finds his ambition is growing with his interest, he needs to be somewhat cautious in his effort to extend his collection. A few charming minor prints are a highly desirable possession; a large collection of them is not. It is easy for the lover of prints who has begun modestly to go on year after year with increasing enthusiasm, piling up numbers of cheap mediocre sheets; and in the end, after having spent enough money to purchase ten great Kiyonagas, he finds himself the owner of a numerous but undistinguished collection in which there is not a single print of the first rank, nor a single one that will compel the admiration of the connoisseur. It is interesting to have a few prints of each type and period as examples, even though they are not notable works; but when the collector has a moderate number he will be wise to cease his miscellaneous buying and husband his resources for the occasional purchase of a masterpiece. More pleasure is to be found in acquiring two or three fine sheets a year than from the wholesale acquisition of hundreds of insignificant works. It is, however, well to define one's limits carefully. If one is not able to expend from ten to a hundred pounds on a single print, one must dismiss from one's mind the idea of owning an important Kiyonaga; for that is the lowest sum at which one can hope to get it even with luck. If an expenditure of thirty to eighty pounds is impossible, one must put aside all idea of a Sharaku. But lesser treasures at lower prices are to be had; let the collector only remember to take care that he gets the best things he can afford even though his purchases be few, rather than allow himself to be tempted into buying a great many of a cheaper kind. Remarkable opportunities to acquire fine prints at low prices sometimes occur, but they are rare. Certain prints may come up for sale only once in a collector's lifetime. These exceptional examples must be seized when they are offered; one of the characteristics of a great collector is the ability to make these swift and often expensive decisions. He must know the available supply of prints and the probability of having another chance to get this particular sheet; if he estimates such a recurrence as improbable, and if he esteems the print a masterpiece, he must take it at any price he can afford to pay.