He gong shu : yi juan - Chinese rare book collection, LOC

According to the end note, this book was printed in winter of 1605 in Ningling County; the contents imply that the author was Lü Kun, a contemporary scholar; not cited in the county history, but mentioned in 'Lü si kou song de bei ji' by Meng Yanghao.
Running title.
In case.
Also available in digital form.
原書不著撰人姓氏. Original book; anonymous.
八行二十字. Eight lines, with twenty characters per line.
原書不著撰人姓氏，卷末題：「萬曆乙巳冬寧陵縣公刻」。閱其內容，知必出於一極負重望人之手，檢寧陵縣志又知非呂坤莫屬。然縣志無明文，惟孟養浩撰呂司寇頌德碑記，稱「上書防河使者，請免濬河夫役」，與是書所載相合。因檢去偽齋集乃全在集中。卷五頁二十五下與總河劉晉川，即河工書第一篇，集文下有註云：「書五附書四，舊題河工書，集分別刻，今補錄」。「集外別刻」者，即指此本也.