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there, and some work was done on the path along the 
western side of that driveway, the southern portion of it 
being completed. 
The necessary construction of the new iris garden paths 
prevented our doing any work on the much needed Bronx 
River paths leading north along the river from the Linnaean 
Bridge referred to in my last report, but we hope to build 
at least one of them next season. 
Grading, regulating, sodding and draining operations, 
requiring much time and labor, were necessary during 
the work of path-building and the construction of the new 
iris garden. 
Details of work on roads, paths, grading and collateral 
operations may be found in the report of the Superintendent 
of Buildings and Grounds hereto appended. 
Water Supply 
The work of extending the 4-inch water-supply in order 
to obtain higher pressure at the mansion mentioned in 
my last annual report was satisfactorily completed during 
the spring. 
Natural Features 
The beauty of the natural woodlands, meadows, river- 
banks and river-cliffs within the reservation remains un- 
diminished. The forested areas, including the hemlock 
grove, are in normal health and luxuriance and their 
maintenance has been restricted to the removal of wind- 
falls, very much fewer in number than the young trees 
which are growing up in them. Some of the iron-railing 
bought through the special development fund may be 
used to extend the railing of trails, noted as desirable in 
my report for IgI9. 
Special Development Fund of 1920 
For the development of parts of the grounds, publication 
of a new guide-book, increase of collections, and additional 
