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attending their removal to the exterior line, would be such as 

 to render such an application of them objectionable. I think, 

 therefore, that a strong picket fence, well secured by battens, 

 would be the best under the circumstances. This would have 

 the further advantage, that at any point where the progress of 

 the work required it, a portion could be temporarily removed 

 and readily replaced. Such a fence would be the most eco- 

 nomical and if subsequently a more substantial enclosure should 

 be decided upon the material would always be of use. 



DRAINAGE. 



The necessity for the thorough drainage of the entire area 

 of the park is very apparent. The peculiar character of its 

 geological formation renders its successful drainage an interest- 

 ing and perhaps a difficult problem. 



The deposits are composed of strata of sand, clay, gravel 

 and pebbles, in very irregular succession, and showing little 

 parallelism or uniformity ; in many places the clay strata 

 being very much distorted. The result of all being a series 

 of rounded hills, some of pure sand, some of sand and clay, 

 and others of pebbles and boulders mixed with clay. In some 

 instances channels seem to have been formed by regular cur- 

 rents of water, while in others deep valleys occur without 

 any approximation to regularity, unless their tendency to a 

 bowl-shape be so construed. The valleys have no outlets, and 

 the water that falls into them either sinks through the soil or 

 collects so as to form pond holes. 



All of the depressions have been connected by a series of 

 levels, which will enable me to lay down a system of drainage 

 which, while effective in removing the surplus water from the 

 soil, will, it is believed, afford a sufficient supply to enable its 

 introduction with marked effect in the general landscape. 



Besides the removal of the water, which is palpably evident 

 in the form of deposits, thorough drainage, comprehends the 

 carrying off, as rapidly as possible after it has fallen, all the 

 water upon the surface which is not absolutely necessary to the 

 soil. A very small portion of the annual rain-fall is absorbed 

 by the soil or is requisite as a constituent of vegetable life. 



All the moisture that remains beyond this required quan- 

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