1851: Three-year-old season A week before Newminster was scheduled to run in the Derby, there were reports that he had gone amiss. However, on 21 May 1851, along with 32 other horses, Newminster lined up at
Epsom Downs for the start of the Derby Stakes.
Teddington was the 3/1 favourite for the race and Marlborough Buck was next in the betting at 7/2, with Newminster being a big outsider at the odds of 1000/15. Newminster never challenged the leaders and did not finish in the top eight. Teddington won the race by two lengths from Marlborough Buck, with Neasham a further length back in third place. Newminster's next race was the two-mile Ebor St. Leger at
York in August. He started as the odds-on favourite, but could only finish third in the five-runner field. The Calculator won the race by a length from Cnaeus. The following month Newminster went to
Doncaster for the
St. Leger Stakes.
Hernandez started at the price of 6/4 and was the pre-race favourite.
Aphrodite was priced at 7/2, The Ban at 5/1, Ephesus at 12/1 and Newminster at 15/1, with the other thirteen runners 20/1 or bigger. The field got away to an even start, with Deceitful setting the pace at the front. Jockey Sim Templeman settled Newminster in the middle of the pack, where he stayed for the majority of the race. As the field turned into the finishing straight, Deceitful faded and Aphrodite took over the lead. Newminster closed up until he was challenging for the lead as they entered the final furlong. He then pulled away near the finish to win by two lengths from Aphrodite. Hookem Snivvy was a further two lengths back in third place, with the favourite eventually finishing in ninth. His win in the St. Leger meant he had to carry a twelve-pound weight penalty in the
Cambridgeshire Stakes. Despite this he stated as second favourite, but was never able to challenge and finished well down the field, behind winner Truth.
1852: Four-year-old season Newminster did not reappear as a four-year-old until
Goodwood in late July, where he ran in a sweepstakes of £300 each over the distance of about three miles and five furlongs. He started as the 1/3 favourite and was ridden by Sim Templeman. At the start of the race Phlegethon went into the lead and pulled clear, at one point being about one furlong clear to the other three runners. With three quarters of a mile left to run Newminster and Harpsichord began to close down the lead. Newminster overtook him as they entered the final furlong and won by two lengths from Harpsichord, with Phlegethon in third place. Two days later he started in the
Goodwood Cup, but did not finish in the top five. The race was won by Kingston, with Little Harry second and Teddington third. In September he finished fourth, behind winner Teddington, in the two and a half mile
Doncaster Cup.
1853: Five-year-old season Newminster's first start as a five-year-old was in the
Tradesmen's Plate at
Chester. He started the race at 15/1, but finished outside the first four, behind winner Goldfinder. His only other start of the season was in August in the
Great Ebor Handicap at York. Pantomime won the race by a neck from The Nabob, with Newminster finishing outside the top eight.
1854: Six-year-old season Newminster only started once in 1854, in the Tradesmen's Plate at Chester. He started the race at 11/1 and was near the front before breaking down with a few furlongs left to run. The race was won by Epaminondas. Newminster was put out of training and sold to Richard Lumley-Saville for 1,300
guineas to stand at stud. ==Assessment==