ry thrombus became washed away.
The newly formed wall of soft clot bounding the effusion proved
insufficient to withstand the full force of the blood pressure, and
extension of the cavity resulted. In the more rapidly developing
haematomata, temporary pressure by the effused blood on the bleeding
vessels was also, no doubt, a common explanation of temporary cessation
of increase in size.

A diffuse soft fluctuating swelling, sometimes accompanied by pulsation,
but oftener without, developed, and not uncommonly diffusion was
accompanied by some discoloration of the surface and elevation of the
general temperature. Such arterial haematomata commonly developed from
ten days to three weeks after the original wound. A few examples will
suffice.

(1) A patient wounded at Elandslaagte was sent down to Wynberg.
The antero-posterior wound in the upper third of the arm was
healed, but a month after the injury a large fluctuating
arterial haematoma developed in the axilla and upper third of
the arm. This was incised (Colonel Stevenson) and a wound of
the axillary artery in its third part discovered, and the
vessel ligatured. The patient made an excellent recovery.

(2) A patient received a wound at Doornkop which traversed the
calf in an obliquely antero-posterior longitudinal direction.
Three weeks later a soft fluctuating swelling developed at the
inner margin of the tendo Achillis occupying the lower third of
the leg. Neither pulsation nor murmur was detected. There was
anaesthesia in the area of distribution of the posterior tibial
nerve. No tendency to further increase was observed, and
operation was postponed. The temperature was normal.

(3) An Imperial Yeoman was struck at Zwartskopfontein at a
range of one hundred yards. The man rode four miles on his
horse after being hit, but the horse then fell and rolled over
him twice. The man was treated successively in the Van Alen,
Boshof, and Kimberley Hospitals, and from the last he was sent
to Wynberg which place he reached on the twenty-third day. When
admitted into No. 2 General Hospital the wounds of type form
and size (_entry_, in posterior fold of axilla; _exit_, 1-1/2
inch below junction of anterior fold with arm) were healed. The
whole upper arm was swollen and discoloured, while an indurated
mass extended along the line of the vessels in