[Preliminary sketch for the murals at the Post Office Department Building in Washington, D.C.]

[Preliminary sketch for the murals at the Post Office Department Building in Washington, D.C.]

[Preliminary sketch for the murals at the Post Office Department Building in Washington, D.C.]

[Preliminary drawings for murals in the Post Office Building in Washington, D.C.]

[Preliminary sketch for the murals at the Post Office Department Building in Washington, D.C.]

[Preliminary drawings for murals in the Post Office Building in Washington, D.C.]

[Preliminary sketch for the murals at the Post Office Department Building in Washington, D.C.]

[Preliminary drawings for murals in the Post Office Building in Washington, D.C.]

[Preliminary drawings for murals in the Post Office Building in Washington, D.C.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]

[Men unloading cargo from mail steamer.]