On July 1, 1839, the commissioners were again in session and the main questions under discussion were the defects in the assessment roll and it was finally ordered returned to the assessor, with orders to "correct and complete forthwith," the board adjourned for two weeks to give the assessor time to do his work, and on July 15 the board was in session again and the assessment roll was accepted. The commissioners at this meeting ordered a tax levy of five mills on the dollar, on all property in the county subject to taxation. The assessed value of Rock county in 1839 was $21,792.45 (the assessed value of Rock county in 1907 was $47,494,980.) On a basis of eighty per cent of true value, which would make the true value of Rock county at present time $66,- 291,722.