THE OAK TREE IN ESSEX. 107 Fig. 18.—Oak in Writtle Park. the trunk of which is 251/2 feet in circumference. This trunk was split completely into two by lightning twenty years ago, and it was again damaged four years ago. It is easy to walk between the two sections. Fig. 19.—Oak at Warren Farm, Writtle. At Warren Farm, Writtle, there is a fine and picturesque old oak tree, having a trunk 18 feet 10 inches in circumference. Rivenhall Oaks.—In the park there are some fine trees measuring from twenty-one to twenty-three feet in circumference. A remark-