Sentence:  The stoning continued heavily from the crowd following in rear and from the fresh crowd, until they reached a spot some 50 yards from the mill. [...] Dawson observed from his position in the Police <WSD>lorry</WSD> which was in rear of the mill <WSD>lorry</WSD>, that the horses were being hit and giving trouble. He also saw stones falling on the cooly <WSD>lorry</WSD>, and Police <WSD>lorry</WSD>. The mill <WSD>lorry</WSD> being covered in with expanded metal, none of its occupants were hurt. 
Meaning of the word marked with <WSD> tags:  A large, low, horse-drawn, four-wheeled wagon without sides; also, a similar wagon modified for use on railways.