Rubuta ci gaba don wannan sakin layi - Sherman ya halarci babban nunin farko a Panama Pacific International Exposition
(PPIE) da aka gudanar a San Francisco a 1915. A wannan lokacin ne ta kara yawan aikin da ta samar, ta yanke silhouettes da yawa kamar yadda ta iya. Ta kuma fara ajiye littattafan baƙi don yin rajistar sa hannun batutuwan da ta yanke. Akwai littattafan baƙi guda shida da aka sani, duk a cikin tarin masu zaman kansu. An sayar da wanda aka yi amfani da shi a PPIE a gwanjo a watan Mayu 2006.