By Brian Sheerin and Emma Berry NEWMARKET, UK -- The millionaire lots kept coming almost to the end and, after a fairly flat start to the day, trade picked up significantly by mid-afternoon to the degree that, by the time the curtain fell on Book 1, a total of 16 seven-figure lots had passed through the ring. That equalled the number sold last year, while 70 in total sold for at least 500,000gns. What was different this time around, however, was a larger catalogue and vendors pointing to some frailty...