10 THE FRESH-WATER LOCHS OF SCOTLAND 
Chumley had charge, during the whole period covered by the survey^ 
of the accounts and payments of the staff, and of the instruments,^ 
charts, and note-books which were despatched to or returned from 
the workers in the field. Mr Chumley has also taken a large part in 
the preparation of the manuscript of this Report and the correction 
of the proof-sheets. This is especially true with regard to the special 
descriptions of the river basins and lochs. He has also superintended 
and been responsible for the planimeter measurements and calculations 
by the other assistants. Mr Chumley's previous experience as my 
assistant in the preparation of the Challenger Reports in a very 
special manner qualified him for these duties. A list of all those who 
have taken part in the work of the survey is given in Appendix VI. 
We desire also to acknowledge the courtesy and assistance 
rendered by Scottish proprietors in the loan of boats, the help of 
keepers and other employees, and in many other directions. It is 
impossible to mention these by name in this place, but without their 
co-operation the work could not have proceeded. In some few cases 
the surveyors were looked on with a little suspicion, but the great 
majority of proprietors took a lively and intelligent interest in the 
survey. It was rather amusing at times to observe the result of the 
soundings on the inhabitants of districts in which the lochs are 
situated. As a rule, lochs, or some parts of a loch, are regarded as 
very deep or without bottom. When a loch with this reputation was 
found to be relatively shallow, the result would be questioned, and 
a feeling of affront or injury prevailed among the inhabitants of the 
district. 
The whole undertaking has occupied a large part of my time and 
thought during the past six or seven years, and has entailed a good 
deal of hard work both in the field and in the study. On the other 
hand, it has been a great pleasure to have been closely associated 
in this work with my old friend Mr Laurence Pullar, with the 
members of the staff, and all those who have voluntarily offered 
assistance for longer or shorter periods in one direction or another. 
II. METHObS AND INSTRUMENTS 
Sounding-Machines. — The first attempts at sounding the 
Scottish lochs were made with the ordinary hempen hand-line. It 
is possible to sound small and shallow lochs in this way, but to 
have used this method in the deeper and larger lochs would have 
taken a very long time ; besides, the slow rate of hauling in this line 
would have increased very greatly the difficulty of determining the 
position of the soundings owing to the drifting of the boat. In order 
to accelerate the work it was necessary to procure a portable wire 
