A simple question, perhaps, but how many arches are there in Accrington Viaduct. Early press reports refer to 21 arches, but the English Heritage listing text implies that there are "19 (originally 21) semicircular brick arches (40ft. span, 60ft. high) with stone plinths, gritstone facings, rusticated voussoirs, roll-moulded string course, and parapet". The listing text then mentions three further arches crossing Blackburn Road which are "now separated from the main structure by a short embankment". However, The Blackburn Standard stated that the short embankment existed at the time of opening - so how many arches are there? Is the listing text incorrect, or just poorly-worded?