AN EXPERIMENT IN RECONSTRUCTION 367 
only at one point — immediately in front of the bregma — 
was the middle line really represented. There were two 
guiding marks to help me : (i) on the under surface of 
the projecting frontal fragment — in front of the bregma 
(fig. 131) — an indication of the great blood-sinus which 
passes backwards under the middle line of the vault 
could be detected ; (2) I surmised, as proved to be the 
case, that the sagittal suture, between the right and left 
parietal bones, turned a little to the left as it reached the 
50 50 75 50 
CAST OF TEST SKULL. RECONSTRUCTION. 
yentex. 
-Drawing of the vault of the test skull, with a corresponding 
'J'- 
drawing of the reconstruction. 
bregma. It was only on such a supposition that I could 
account for a trace of an oblique suture on the hinder 
part of the frontal projection — apparently the commence- 
ment of the coronal suture of the right side. The 
position of the lambda (fig. 131) was also rightly placed. 
The vascular markings under the hinder angle of the 
parietal fragment, and the fact that the lambda is rarely 
placed more than 10 mm. in front of the occipital end of 
the skull — when orientated on the plane described in this 
book — showed me that at least 1 5 mm. had been cut 
