The fourth addition was developed in 1917 along Mockingbird across from SMU. Gillon is the southern boundary. Katy Trail and Abbott create the boundary on the Dallas side, historic Hackberry Creek, along St. Johns, make up the western boundary. These 238 acres were developed simultaneously with SMU and many of its streets were named after elite colleges and universities: St. Johns, Cornell, Princeton, Dartmouth and Harvard. This was the first section to be developed with now standard 50 x 150 foot lots, the same size as the M Streets on the other side of North Central Expressway. Smaller, older homes are found among new homes built in the 1970s, 1980s and 1990s. This neighborhood is walking distance to the SMU stadium, Red Barr Pool, Meadows Museum, Highland Park Methodist Church, the shops along Mockingbird Lane and several parks (Dyckman Park, and Abbott Park) and Armstrong School, which gives this neighborhood a friendly, old-fashioned atmosphere.