Eleven large European elms fronted it on Tremont Street. The elms were planted in 1762 by Major Adino Paddock and John Ballard and reached ten feet in circumference by 1856. The walk under the elms was known as "Paddock's Mall," while the rest of the grounds were devoid of any trees at all. The first major improvement was undertaken in 1830, when a number of trees were planted around the grounds. The property was improved again in 1840 by the construction of an iron fence on Tremont Street. The fence was designed by Boston architect Isaiah Rogers at a cost of $5,000, half paid by the city and half by public subscription. Rogers designed an identical Egyptian revival gateway for Newport's Touro Cemetery.