Something of the skill of these people in choosing land on which to grow corn, also an idea of the quantity grown, are furnished by Black Hawk in his _Autobiography_: “In the front a prairie extended to the Mississippi, and in our rear a continued bluff gently ascended from the prairie. * * * On the side of this bluff we had our corn-fields, extending about two miles up parallel with the larger river, where they adjoined those of the Foxes, whose village was on the same stream opposite the lower end of Rock Island and three miles distant from ours. We had eight hundred acres in cultivation, including what we had on the islands in Rock River. The land around our village which remained unbroken, was covered with blue-grass which furnished excellent pasture for our horses. * * * The land being very fertile never failed to produce good crops of corn, beans, pumpkins, and squashes.”[22] Black Hawk then goes on to state that, owing to encroachments of the white settlers, his people had hard work to find sufficient land on which to plant corn, and gives a sorrowful account of the distress caused by the confiscation of their crops by the whites. Black Hawk does not give any estimate of the area cultivated by the Foxes, but Col. John Shaw, in speaking of both settlements, estimates the fields at five thousand acres.[23] This is probably an exaggeration, but it serves its purpose in giving some notion of the importance of agricultural industry to the Indians themselves, and surely it was not inconsiderable. Anyone wishing to estimate the amount of these products by the various tribes, will find some data in the _Emigrant’s and Traveller’s Guide_, where a fairly good estimate of the numbers of the several Indian tribes in 1834 appears.[24]