Final answer:
Reginald Marsh's mural, 'Sorting the Mail', depicts the workers and machinery involved in the process of moving the mail. While the mural does not directly name who performs the duties of a mail orderly, it illustrates the combined effort of human strength and mechanization in the postal system during Marsh's time.
Step-by-step explanation:
The question 'Who perform the duties of the mail orderly in HQ company?' does not directly relate to Reginald Marsh or his murals. However, it provides an opportunity to discuss the representation of the mail system as depicted in the art of Reginald Marsh, particularly in his mural titled Sorting the Mail. In the mural, Marsh illustrates the vigorous activity and rhythm of workers in the mail sorting process. This piece, located in the Ariel Rios Federal Building, Washington DC and measured at 213.36 x 411.48, is a visual study of the mail system during Marsh's era. Through his art, Reginald Marsh showed how the mail system worked and highlighted the roles of the workers within it.
In Sorting the Mail, the viewers are presented with the depiction of robust men interacting with large sorting machines, which Marsh painted in a palette of green, black, and white. This mural does not only showcase the mechanization and technology in the mail system but also emphasizes the physical effort of the workers. The inclusion of rigorous human action together with the machinery in the mural, conveys the combined effort of man and machine in the postal services. It is this interplay that essentially 'performs the duties' within a mail system.
While the mural does not answer the question directly, it resonates with the theme by displaying the historical context of how mail was sorted and transported, and the people who were responsible for these tasks. Hence, the duties of mail orderly in any HQ company, at least as depicted by Marsh, can be seen through his artistic expression as a joint effort of manpower and technological support driving the efficiency of the postal system.