Jeff Harris, a Non-Executive Director at WH Smith, purchased 10,000 shares in the stationery and book retailer on Friday, one day after the firm's interim results.Harris, currently the Chairman of FTSE 250 speciality plastic and fibre products supplier Filtrona who joined WH Smith's board in June of last year, paid 533p per share bringing the total transaction value to £53,300. Following the purchase, he holds a 0.008% stake in WH Smith.On Thursday, the group reported that like-for-like (LFL) and total sales fell in both its main divisions in the six months to the end of February but profits were up. Total sales were £665m (2011: £686m) with LFL sales down 5%. According to an Investec research note today: "A solid set of interim results was in line with our and consensus forecasts, underlining once again the strength of the group's cash generation, which supported a 15% increase in the interim dividend."Top Director BuysWH Smith (SMWH) Director name: Mr Jeffrey Francis HarrisAmount purchased: 10,000 @ 533.00p Value: £53,300Fairpoint Group (FRP) Director name: Mr John AllkinsAmount purchased: 50,000 @ 65.00p Value: £32,500Top Director SellsXaar (XAR) Director name: Mr Ian DinwoodieAmount sold: 330,357 @ 225.00p Value: £743,303BrainJuicer Group (BJU) Director name: Mr Simon GodfreyAmount sold: 20,000 @ 302.75p Value: £60,550BC