Arthur Slenk found two boxes of handwritten music sheets over twenty years ago, used by an amateur orchestra between 1872 and 1941. The documents had not seen daylight in almost half a century. Carefully, he started examining page upon page, discovering the genesis, the varying pressure of pen on paper, a corrected mistake, a tiny ink stain where the pen had stumbled over a fiber, fingerprints, signs of wear in the corner where the sheet was flipped over – all these traces suddenly shined a light upon the obscure members of this amateur orchestra. He then sorted the sheet music by subject into separate envelopes, and finally pasted. Each design was painstakingly subjected to critical examination, often followed by corrections. After seven years of work that produced 144 Letter-size designs, he considered this task completed.