Final answer:
R. Campbell Thompson's specific publication date for his English translation of the Epic of Gilgamesh is not provided in the references, but given his activity in the early 20th century, it is likely from the 1920s. The Epic encapsulates themes of leadership, mortality, and the human condition within ancient Mesopotamian culture.
Step-by-step explanation:
The Epic of Gilgamesh is a pinnacle of ancient literature and a cornerstone for understanding the cultural and philosophical heritage of Mesopotamian civilization. Though R. Campbell Thompson's specific date of publishing his English translation is not directly stated in the provided materials, he is known to have published translations and studies of Assyrian texts and the Gilgamesh epic during the early 20th century. Therefore, it is likely that Thompson's translation work on the Epic of Gilgamesh in English was done around that time, mainly the 1920s. It's important to look into historical records or specific publications by Thompson to find the exact date of his translation of this ancient epic.
The Epic of Gilgamesh revolves around the adventures of the semi-divine king Gilgamesh of Uruk and his companion Enkidu, tackling themes such as leadership, friendship, mortality, and the human condition. Gilgamesh's quest for immortality in the face of human mortality is a central focus that illustrates the advanced engagement with existential issues by the ancient Mesopotamians.