The quantity and value of the fish caught by the Dutch off the British coasts were variously stated. Keymer, in his first tract, estimated the quantity of herrings taken by the 2000 busses in the twenty-six weeks of their fishing at about 300,000 lasts (or 3,600,000 barrels) annually, and the value, at first hand, at £3,600,000 sterling. But the merchants who exported the pickled herrings--and by far the greater quantity were exported[248]--are said to have charged from £16 to £36 a last, the eventual value as merchandise being estimated at not less than £5,000,000 sterling. In his later treatise the value of the herrings exported by the Dutch is placed lower, at about £1,768,000, the quantity being stated at from about 89,500 to 100,500 lasts, or from 1,074,000 to 1,206,000 barrels. Gentleman, whose work seems to have been the most trustworthy, estimated the quantity of herrings taken by the Dutch in the British seas at over 100,000 lasts or 1,200,000 barrels, the original value at £1,000,000 sterling and the gross value at twice that amount; “while we,” he says, “take no more than to bait our hooks.” Gentleman’s estimate of the quantity may be taken as approximately correct, because in the present day the least effective of the vessels taking part in the Dutch herring fishery--namely, the old-fashioned flat-bottomed boats (_bommen_)--catch and cure on an average in a season about 660 barrels each, so that the quantity taken by a fleet of 2000 of such vessels would be about 1,320,000 barrels. But the old busses were of a superior type, keeled vessels (_hoekers, sloepen_), and the average catch of their modern representatives in a season is about 1060 barrels, which for a fleet of the same number would give a total yield of about 2,120,000 barrels, or over 176,000 lasts. Monson placed the value of the herrings exported from Holland to the Baltic at £800,000, and of those sent to other countries at £1,000,000,[249] while Sir Nicholas Hales in 1609 estimated the value of the exported herrings at £4,000,000, but raised it later, in 1634, to £6,000,000, owing to information received from Amsterdam.[250] Sir John Borough’s estimate was still higher. He said that if account was taken of all the herrings, cod, ling, and other fish caught in the British seas by foreigners, the gross value would exceed £10,000,000 a year. The larger figures above cited are unquestionably exaggerated, but even the lowest shows how very valuable the sea fisheries were to the Dutch at the beginning of the seventeenth century, for the total value of all the commodities exported from England in 1613 was placed at £2,487,435, and the value of the imports at £2,141,151.[251]