52 
HISTORICAL ACCOUNT OF THE HERBARIUM. 
Mr. Bennett expresses the desire that botanists should confirm the 
record for this plant in Yorkshire. 
After leaving Copgrove, Mr. Dalton went to Catterick Bridge 
(1791), and thence to Croft on Tees (1805), where he discharged 
his ministerial duties until his death in 1843. 
Croft is pleasantly situated on the Yorkshire side of the Tees, 
and is much resorted to by tourists and invalids on account of its 
mineral waters and picturesque surroundings. 
Mr. Dalton found it to be a convenient centre during the years 
1806-1826 for investigating the flora of Teesdale, and specimens 
exist in the herbarium which prove that he frequently explored 
Lower Teesdale, particularly about Yarm, Stockton, Redcar, etc. 
The construction of the Darlington and Stockton Railway (1825), 
the discovery of the mines containing Iron Ore in the Cleveland 
Hills (1850), and their subsequent development, have completely 
altered the surface of the country in many parts of Lower 
Teesdale. 
Between 1806-26 the name of Middlesbrough was not known, 
and is not mentioned by Mr. Dalton. The census of Middlesbrough 
records the number of inhabitants in 1831 as 154 ; in 1841, 5463. 
During the next fifty years the population and trade increased at 
a remarkable rate. In 1901, the population of the municipal and 
parliamentary borough of Middlesbrough was over 91,000. The 
cause of this remarkable energy in the increased trade and popula¬ 
tion must be sought in the introduction of the iron and steel 
industries in that district. 
Although the Yorkshire coast about Redcar frequently engaged 
Mr. Dalton's attention, he also loved to ramble amongst the fells 
of Upper Teesdale, and as a result of these expeditions we have in 
the herbarium specimens from Pierce Bridge, Wycliffe, Rokeby, 
Barnard Castle, Middleton, High Force, Cronkley Fell, and 
Cauldron Snout. 
From Piercebridge (where the great Roman road from London 
to the Forth crosses the Tees), Mr. Dalton frequently made 
botanical excursions in the old coaching days. 
The remarkably rich district from Barnard Castle and Middleton 
and thence to Cronkley and Mickle fell, was traversed by Mr. 
Dalton in company with the Rev. J. Harriman. 
It may be observed that the flora of Teesdale was then only 
imperfectly known. The valley only possessed a rough moorland 
track, whilst accommodation for rest or refreshment was of the 
