Sharp collected two versions of "Swannanoa Tunnel" with the 'Bull-dog' verse:

From Sarah Buckner and Mrs. Ford 1916:

"Swannanoa Tunnel" No. 91 A:

When you hear my bull-dog barking,
Somebody 'round, baby somebody round.

When you hear my pistol firing,
Another man dead baby, another man dead.

Sharp's version from 1918 also has the same verses but in different places. He also hears "Swannanoa Town, O" for "Swannanoa Tunnel" as pointed out by Dick Greenhaus. The same lyrics appear in "My Old Hammah" from Carl Sandburg's book.

Is East Colorado Blues an early version of Nine Popund Hammer?

-Richie