Complex sentence: In 1901 Marks moved to Birkenhead open market where he amalgamated with Spencer, the pair were allocated stall numbers 11 & 12 in the centre aisle in 1903, there they opened the famous Penny Bazaar.
Split into simpler sentences: In 1901 Marks moved to Birkenhead open market where he amalgamated with Spencer. The pair were allocated stall numbers 11 & 12 in the centre aisle in 1903, and there they opened the famous Penny Bazaar.