| 2004.01.1211 (HAT 55-228) | Ralph Griswold with technical and landscaping staff on the steps of the Temple of Hephaistos. By his side, on the right, the foreman, Sophokles Lekkas and Nikos Restakis. The tall man in suit at the last row is Piet de Jong. | 21 May 1955 | | |
| 2004.01.1212 (HAT 55-229) | The landscape crew (Griswold in the center) celebrating their accomplishments, May 21, 1955. | 21 May 1955 | | |
| 2004.01.1248 (HAT 54-180) | Landscaping of the Agora. Queen Frederika and King Paul at the Agora for the inauguration of the tree planting project. The Director of the School, John L. Caskey with Their Majesties. | 4 Jan 1954 | | |
| 2004.01.1249 (HAT 54-33) | Landscaping of the Agora. King Paul is planting an oak tree. At right, the Director John L. Caskey. | 4 Jan 1954 | | |
| 2004.01.1252 (HAT 54-516) | Landscaping of the Agora. Girl guides of Athens and Attica participating in the tree planting program at the Agora. Ralph Griswold supervising the planting. | 12 Dec 1954 | | |
| 2004.01.1253 (HAT 55-131) | Landscaping of the Agora. Boy scouts of Athens and Attica participating in the tree planting program at the Agora. Marching by the Temple of Hephaistos. | 20 Feb 1955 | | |
| 2004.01.1254 (HAT 55-132) | Landscaping of the Agora. Boy Scouts of Athens and Attica helped planting some of the donated trees. Here in the court of the Old Excavation House. Standing among them are Dr. John Caskey, Ralph Griswold and Homer Thompson. | 20 Feb 1955 | | |
| 2008.18.0246 (HAT 54-506) | Girl Guides of Athens standing in front of the Temple of Hephaistos before setting out to plant laurel trees, December 12, 1954. Note the progress made on demolishing the terrace wall surrounding the temple. Ralph E. Griswold can be seen at right. | 12 Dec 1954 | | |
