Blackwall Rock
... that one surveyor's proposal for removing the Blackwall Rock obstruction in the Thames involved using explosives he knew would likely kill some of the labourers?
... that one surveyor's proposal for removing the <b id="mwCKs"><a href="./Blackwall_Rock" id="mwCKw" rel="mw:WikiLink" title="Blackwall Rock">Blackwall Rock</a></b> obstruction in the <a href="./River_Thames" id="mwCK0" rel="mw:WikiLink" title="River Thames">Thames</a> involved using explosives he knew would likely kill some of the labourers?