Mystery and disappointment are not absolutely indispensable to the growth of love, but they are, very often, its powerful auxiliaries. 'Out of sight, out of mind,' is well enough as a proverb applicable to cases of friendship, though absence is not always necessary to hollowness of heart, even between friends, and truth and honesty, like precious stones, are perhaps most easily imitated at a distance, when the counterfeits often pass for real. Love, however, is very materially assisted by a warm and active imagination: which has a long memory, and will thrive, for a considerable time, on very slight and sparing food. Thus it is, that it often attains its most luxuriant growth in separation and under circumstances of the utmost difficulty; and thus it was, that Nicholas, thinking of nothing but the unknown young lady, from day to day and from hour to hour, began, at last, to think that he was very desperately in love with her, and that never was such an ill-used and persecuted lover as he.

Still, though he loved and languished after the most orthodox models, and was only deterred from making a confidante of Kate by the slight considerations of having never, in all his life, spoken to the object of his passion, and having never set eyes upon her, except on two occasions, on both of which she had come and gone like a flash of lightning--or, as Nicholas himself said, in the numerous conversations he held with himself, like a vision of youth and beauty much too bright to last--his ardour and devotion remained without its reward. The young lady appeared no more; so there was a great deal of love wasted (enough indeed to have set up half-a-dozen young gentlemen, as times go, with the utmost decency), and nobody was a bit the wiser for it; not even Nicholas himself, who, on the contrary, became more dull, sentimental, and lackadaisical, every day.

While matters were in this state, the failure of a correspondent of the brothers Cheeryble, in Germany, imposed upon Tim Linkinwater and Nicholas the necessity of going through some very long and complicated accounts, extending over a considerable space of time. To get through them with the greater dispatch, Tim Linkinwater proposed that they should remain at the counting-house, for a week or so, until ten o'clock at night; to this, as nothing damped the zeal of Nicholas in the service of his kind patrons--not even romance, which has seldom business habits--he cheerfully assented. On the very first night of these later hours, at nine exactly, there came: not the young lady herself, but her servant, who, being closeted with brother Charles for some time, went away, and returned next night at the same hour, and on the next, and on the next again.

These repeated visits inflamed the curiosity of Nicholas to the very highest pitch. Tantalised and excited, beyond all bearing, and unable to fathom the mystery without neglecting his duty, he confided the whole secret to Newman Noggs, imploring him to be on the watch next night; to follow the girl home; to set on foot such inquiries relative to the name, condition, and history of her mistress, as he could, without exciting suspicion; and to report the result to him with the least possible delay.

Beyond all measure proud of this commission, Newman Noggs took up his post, in the square, on the following evening, a full hour before the needful time, and planting himself behind the pump and pulling his hat over his eyes, began his watch with an elaborate appearance of mystery, admirably calculated to excite the suspicion of all beholders. Indeed, divers servant girls who came to draw water, and sundry little boys who stopped to drink at the ladle, were almost scared out of their senses, by the apparition of Newman Noggs looking stealthily round the pump, with nothing of him visible but his face, and that wearing the expression of a meditative Ogre.

Punctual to her time, the messenger came again, and, after an interview of rather longer duration than usual, departed. Newman had made two appointments with Nicholas: one for the next evening, conditional on his success: and one the next night following, which was to be kept under all circumstances.