Mr. DOOLITTLE. I say I do not understand what may have occurred in that committee. I only know that before another committee of the body testimony was taken on the same subject; I refer to the Sand creek massacre. Governor Evans, the person alluded to, appeared before that committee on 2 or 3 occasions, and I must say that there was nothing in the testimony which led those of us who heard it to suppose or believe that Governor Evans had any knowledge of the meditated attack of Colonel Chivington upon the Indians at Sand creek. Indeed, there was some testimony before us which tended to show that Chivington made the attack without any knowl edge on the part of Governor Evans. I feel that it is but just to Governor Evans to say this. As to the Sand creek affair, I shall not speak at the present time. I have already expressed my opinion on that subject in very strong terms in the Senate. Having said thus much, I come directly to the consideration of the question that controls my mind on this subject; and that is the question of the population of the Territory of colorado. In 1861 there was a census taken of the poulation of Colorado, and the census showe that there were there 18, 228 males, 2, 622 mine rs, and 4, 484 females, making the regate population 25, 329. At that time there were 10, 580 voters in the Territory, or one voter to every 2 and a half of the population. If you assume the relative proportion of voters to the population to be as one to 2 and a half you can form a ver correct estimate of the population during the years 1802, 1864, and 1865, for in each O those years elections were held, and the votes of the people of the Territory were taken. In 1861, as have stated, there were 10, 580 voters in a population of 25, 329. At the election held in 1862 there were 8, 224 votes cast, and the same ratio would give us a populatioo of 20, 500. In 1864 there was another election held, at which there were 6, 192 votes cast, and the same proportion would give a population of 15, 480. In 1865 there was another election held, and the number of votes cast was 5, 005 and the same proportion would give a population of 14, 762. lhe question arises, if the population of Colorado was 25, 326 in 1861, how can it be that that population now is but 14, 702? The causes are sufficient to anyone who is familiar with the history of the time. Colorado is surrounded by other Territories full of mines, and these minersZ who are without families Generally, can, Without great expense, and without any trouble or the breaking up of family ties, at once mi the from one mining district to another, an the mining districts of Idaho and Montana have actually drawn 03 this population from Colorado. General Pierce, the surveyor general, says, speaking of the population of Montana, that it was about 40,000, one 4th of which came from Colorado., According to thatstatement nearl 10,000 of the mining population left Colora o to go to Montana. Othersgmrhaps, went in and to a certain extent an plie their places. Then, another cause has been in operation to diminish the number of people in Colorado. While the war was pending there were 2 or 3 regiments raised in Colorado; they were employed mostly in fighting the Indians, and some few came further cast into Kansas, and into the service of the U.S. The Indian wars and difficulties upon the plains interrupted the communication between the States and Colorado, and made provisions in Colorado so very expensive that it was impossible for them to sustain mining operations with any great de recof success; and it is a fact which you, h