As a general rule catarrhal croup is rarely met with after the age of six. Children in whom it occurs have either seemed quite well, or at most have been a little ailing for a day or two with cold, and cough, and perhaps slight hoarseness. They go to bed and fall asleep as usual, but the cough, which does not wake them, becomes suddenly noisy, ringing, croupy, and the breathing is speedily attended with a long-drawn sound, half-hissing, half-ringing, and the child soon wakes alarmed, and fighting for breath, the skin bathed in perspiration, the face flushed and anxious. The cough, the difficult breathing, and the struggle for air last for an hour or two, or sometimes all night long, though they gradually subside, at any rate towards the approach of morning, when the child falls asleep, and, but for a somewhat hoarse sounding cough, and a look of fatigue, there are but few signs of all that it has endured.

The attack may not return, or it may recur for two or three successive nights, though in general with lessened severity, the child during the daytime seeming to suffer only from a slight cold, or now and then, and so rarely that I have not known it to occur above once or twice in all my experience, it may end in real inflammation of the windpipe; but not in diphtheria.

Attacks of this kind may recur three, four, or more times even in childhood, while diphtheria has no tendency to recur, but like measles or scarlatina seldom appears more than once, though the rule is subject to more numerous exceptions than are found in the case of the eruptive fevers. Still the fact of an attack of this sort returning should of itself lessen apprehension and make the parents look forward to its issue with less anxiety than that with which they regarded its first occurrence.

A fact which shows how large a part is played by disturbance of the nervous system in these cases is the liability of children who have suffered from it to attacks of asthma, often of great severity as they grow older, while very often after the transition from childhood to youth has passed these attacks too lessen in frequency and severity, and often altogether cease.

There are two measures which, while waiting for the doctor's arrival, may at once be taken, and which sometimes remove the symptoms almost as if by magic, while even were the case one of diphtheria they would still be of some service, and could not possibly do any harm. They are the hot bath, and a full dose of ipecacuanha wine. The former should be as hot as it can be borne, 93° or 94°, and the child should be kept in it for five minutes, and the latter should be given in a full dose, as a teaspoonful in warm water every quarter of an hour till free vomiting takes place. How much better soever the child may seem after the use of these remedies, it should still be kept for two or three days under careful medical observation.

Diphtheria.—In diphtheria croup is only one, though the most frequent, and one of the most serious, of the many dangerous symptoms which attend it. The croupal symptoms hardly ever come on quite suddenly, but are almost always preceded for some days by slight feverishness, languor, and restlessness, in spite of which the child still amuses itself; and if too young to express its sensations, the slight degree of sore-throat it experiences is manifested rather by a disinclination to take food than by any obvious difficulty in swallowing. There is no cough, nor any change of voice when the child is awake, but when asleep—and the sleep is generally uneasy—it often breathes with its mouth open, it snores slightly, or there is a little hoarse sound accompanying the breathing owing to a trivial swelling of the throat; while, if sought for, there will generally be found a very little enlargement, and a very little tenderness of the glands at the corner of the lower jaw. The eyes are sometimes tearful, there may be slight running at the nose, and the child is said to have a bad cold with slight sore-throat—the most remarkable feature of the case being generally that the depression of the patient is out of proportion to the severity of the local ailment. If now the throat is examined—and examination of the throat should never be omitted in any case where there is the slightest difficulty of swallowing—nothing may at first be seen but a very little swelling, and some redness of one or other tonsil. In a few hours more, white specks like little bits of curd will be seen first on one tonsil, then on the other, and next these specks will have united to form one continuous layer of a sort of yellowish-white membrane over the palate and tonsils. The examination of the throat, often so difficult when children are ill, is attended with almost none, if while they are well they have been taught the little trick of opening their mouths to show their throat, and of allowing the introduction of a spoon to keep down the tongue, a proceeding which though certainly unpleasant they will almost always readily agree to, like Martha Trapbois, in the 'Fortunes of Nigel,' 'for a consideration.' The deposit on the throat may disappear of its own accord, and not be reproduced, and this even though no treatment has been adopted, and in two or three days the child may be pretty well again, though strength is in general regained less rapidly than might have been expected from the comparative mildness of the attack.

In cases so slight it is no easy matter to recognise the features of a highly dangerous disease; still, out of forerunners so trivial as these, croupal symptoms may be developed, and their advances may be most insidious, and unless both parents and doctor have been closely on the watch they may be surprised all at once by the breathing suddenly becoming very laboured, by that and the cough becoming attended by the sounds characteristic of croup, and by the child's life being in extreme jeopardy, or in danger even beyond the hope of recovery.

It is not that here, as in cases of catarrhal croup, the ailment has really come on suddenly, but that the disease has been silently making unsuspected progress. Whenever then a child, after a few days of slight causeless ailing, accompanied with some little discomfort in swallowing, is seen to have white patches at the back of its throat, do not allow yourselves to be lulled even by their disappearance into a feeling of absolute security. Watch the child, and beg the doctor to watch it carefully, until it is perfectly well again, for though the deposit may have disappeared from the back of the throat it may continue to be formed in the windpipe, and in the somewhat depressed state of the nervous system which attends diphtheria it may not excite that irritation which any such cause would produce in a child in perfect health, and consequently not announce its presence until its amount has become so considerable as to offer an almost insurmountable obstacle to the entrance of air. Any, even the slightest, hurry of breathing, a hissing sound when the child draws its breath, hoarseness of voice, or a ringing cough, should quicken your apprehension of danger, and make you seek for immediate help.

It may be as well, however, to mention here, that not every white speck seen at the back of the throat is of necessity due to diphtheria, but that in some cases of ordinary sore-throat white spots may form on the surface of the tonsils. These white spots are due to the collection at their openings of the secretion formed in the minute glands which beset the surface of the tonsils, and which at these seasons is poured out in greater abundance than usual. They are distinct from each other, and do not coalesce into a membrane; the surface beneath is not the uniform red shining surface on which the membrane in diphtheria has formed, but the separate tiny openings from which the white matter has exuded may be distinctly seen if the surface is wiped with a camel's-hair brush. It is, of course, wise in every case to leave to the doctor the decision as to the nature of the deposit, but it may sometimes relieve needless anxiety to know beforehand that there is another cause besides diphtheria to which white spots at the back of the throat may be due.