final scientific book
... that Charles Darwin's final scientific book discussed the formation of mould through the action of earthworms?
... that <a href="./Charles_Darwin" id="mwDZQ" rel="mw:WikiLink" title="Charles Darwin">Charles Darwin</a>'s <b id="mwDZU"><a class="mw-redirect" href="./The_Formation_of_Vegetable_Mould_through_the_Action_of_Worms" id="mwDZY" rel="mw:WikiLink" title="The Formation of Vegetable Mould through the Action of Worms">final scientific book</a></b> discussed the formation of <a href="./Earthworm#Locomotion_and_importance_to_soil" id="mwDZc" rel="mw:WikiLink" title="Earthworm">mould</a> through the action of <a href="./Earthworm" id="mwDZg" rel="mw:WikiLink" title="Earthworm">earthworms</a>?