31 
These mountains, whose positions are shown on the 
accompanying map, are eight in number, their names and 
- their height above sea level being as follows: 
Bilovuniat Oval ee etiiee one ts 769-6 feet. 
Montarville or St. Bruno...... 715 feet (O'Neill). 
SC) 5 ee a ec were cota TAe7, ) “oaG@eerey)) 
Vote ciiOnt 2.) gece e's 5 1250-05" 
Piemmnas las es Aree he bn 1470) © +, LCV oungy): 
STEN OT ay ee ee, ee 13725. 
| SOT Sag gear eo L755, 
Mount Johnson or Monnoir.... 875 “ 
They have been called the Monteregian Hills from 
Mount Royal (‘‘Mons Regius”’), which is the best known 
member of the group and may be taken as their type. 
Brome mountain is by far the largest member of the 
group, having an area of 30 square miles. Shefford comes 
next in size, having an area of rather less than nine square 
miles; while Mount Johnson, which is very much smaller 
than any of the others, has an area of only -422 of one 
square mile. 
Of these eight, the first six, as Logan* notes, “stand 
pretty nearly in a straight line.’ running approximately 
east and west, Mount Royal being the most westerly, and 
the others following in the order in which they are enum- 
erated above, until Shefford mountain, the most easterly 
member of the series, is reached. Mount Johnson and Brome 
mountain lie on a line parallel to them, a short distance 
to the south, Rougemont being the nearest neighbour to 
Mount Johnson and Brome mountain immediately south 
of Shefford. Itis highly probable, in view of this distribu- 
tion, that these ancient volcanic mountains are, as is usual 
in such occurrences, arranged along some line or lines of 
weakness or deep-seated fracture. The “pretty nearly 
straight line”’ referred to by Logan, on which the first six 
mountains of the group are situated, must be considered 
either as a single line with a rather sharp curve in the middle 
or as made up of two shorter straight lines, each with three 
mountains, diverging from one another at an angle of 
about 30°, with Montarville at the point of intersection. 
Mount Johnson and Brome mountain might then be 
considered as situated on short subsidiary fractures. 
*Geology of Canada, p. 9. 
