Field Meetings. 171 
THORNHILL District.—4th July. 
The third meeting of the session was held on the 4th July, 
when, according to the programme, the party was to leave Dum- 
fries Station by the 8.57 a.m. train for Thornhill, and proceed 
from there by conveyances to Drumlanrig Bridge. From there 
they were to walk along the Duchess’s Drive, and through woods 
and glens by the side of the Nith to Glenairlie Bridge, where the 
machines and those who preferred remaining in them, would be 
in waiting. On re-assembling they were to visit Ballagan Moat, 
Tibbers Castle, and Dr Grierson’s Museum. At the appointed 
hour 36 members left the station, and on their reaching Thorn- 
hill they were joined by Dr Grierson, and subsequently by Mr 
Shaw and Mr T. Brown, the latter having promised to conduct 
the party in their explorations. The first halt was made at 
Drumlanrig Bridge, to allow the party to view the beautiful 
scenery there, and to walk along the bank for a short distance to 
the foot-bridge spanning the river. Having spent half-an-hour 
in this delightful spot, they retraced their steps to the machines, 
when the botanists and those who cared for a five-mile walk 
started along the Duchess’s Drive. The ladies and a few others 
took their seats in the machines and drove to Glenairlie Bridge. 
From Glenairlie they proceeded to the farm-house of Burnmouth, 
where they were most hospitably entertained to luncheon by Mr 
Milligan. 
Owing to corn having been sown in the fieldin which Ballagan 
Moat was situated, and it being now saturated with the heavy 
showers of the preceding night, it was thought advisable not to 
visit it on this occasion, so the party resumed their seats and 
drove to Tibbers Castle, along the high road over Crairie Hill, 
thus enabling them to have a magnificent view of the valley of 
the Nith, which is one of the finest pieces of scenery in the south 
of Scotland. Tibbers Castle was reached in good time, and it 
was duly described by Dr Grierson. It is supposed to have been 
originally a Roman fortress, named in honour of Tiberius Czesar. 
Very little of the structure now remains, except portions of two 
of the outer walls. 
Under Mr Brown’s guidance the party spent half an hour in 
_ the gardens at Drumlanrig, and from there they drove to the 
Thornhill Museum, which was reached about half-past five. 
Having partaken of tea, thoughtfully provided by Mary (Dr 
