REPORTS ON EXCURSIONS. 99 
stone have yet been found in it. These circumstances indicate 
that the river at whose mouth this formation has been deposited, 
in what is known to geologists as carboniferous limestone times, 
came from the north-west, probably from an extensive continent 
of which our Highlands and the older parts of the Hebrides are 
the much-wasted remnants, and that the trap hills of the Campsie 
and Kilpatrick ranges were not then exposed to the air. 
On the way back to Milngavie, the party visited the ruins of 
the old castle of Craigmaddie, a tower of unknown antiquity, 
situated on a cliff (“the rock of the wolf”), and once the seat of 
the Galbraiths of Bathernock, the possessors of the surrounding 
barony seven centuries ago and earlier. 
On the works at the new reservoir, the deep part of the puddle- 
trench was inspected. Owing to the rocks being much cracked, 
probably by the intrusion of the basalt among the sandstone and 
shale, water flows through them, and the trench had to be ex- 
cavated to the enormous depth of 180 feet or thereby before an 
impervious bed of shale could be reached. This hollow is now 
being filled up with puddle composed of worked clay free from 
stones, so that no water may leak out of the reservoir. 
REDLANDS AND WESTMOUNT, KELVINSIDE, 8th April, 1893.—At 
Redlands, the party were received by Mr. George Russell, an 
esteemed member of the Society, who has charge of the very 
valuable collection of exotics contained in the plant-houses there. 
Mr. Russell is well known as one of the most experienced orchid- 
growers in the West of Scotland, and frequent notices have 
appeared in the leading horticultural papers regarding the rarer 
and more interesting species so successfully cultivated by him. 
On entering the grounds, much interest was taken in a pink- 
flowered Hawthorn. Sixty-two years ago this tree was growing 
in Cambridge Street, Glasgow, where the residence of the late Mr. 
William Mirrlees was situated. It was afterwards transplanted 
to the grounds adjoining his new house in Sauchiehall Street, 
where, in 1870, it had attained a height of 40 ft. During that 
year, the tree was once more transplanted and placed in its present 
position at Redlands, the residence of Mr. J. B, Mirrlees, where it 
continues to maintain a vigorous growth. 
