Sketch of Affairs at Camp Grant Anterior to the Massacre.

WASHINGTON. July 20.--The following is an account of affairs at Camp Grant, Arizona, which preceded the horrible massacre of which a graphic account was published this morning. It is extracted from a letter to Col. J.G.C. LEE, United States Army, Tucson, Arizona Territory, written by Lieut. WHITMAN, in command at Camp Grant at the time of the tragedy:

If I could see you and have a long talk and answer all your questions, I could come nearer giving you a clear idea of the history of the Indians at this post than by any written account. Having had them constantly under my observation for nearly three months, and the care of and for them constantly on my mind, certain things have become so much a matter of certainty to me, that I am liable to forget the amount of evidence necessary to convince even the most unprejudiced mind that has not been brought in contact with them. I will, however, try and give you a connected account, and if it proves not sufficiently full in details, you may be sure all its positive statements will be sustained by the testimony of all competent judges who have been at this post and cognizant of the facts.

Some-time in February a party of five old women came in under a flag of truce, with a letter from Col. GREEN, saying they were in search of a boy, the son of one of the number, taken prisoner near Salt River some months before. This boy had been well cared for, and had become attached to his new mode of life, and did not wish to return. The party were kindly treated, rationed while here, and, after two days, went away, asking permission to return again. They came in about eight days, I think, with a still larger number, with some articles for sale to purchase mantles, as they were nearly naked. Before going away, they said a young chief would like to come in with a party and have a talk. This I encouraged, and in a few days he came with about twenty-five of his band. He stated, in brief, that he was chief of a band of about 150 of what were originally the Aravapa Apaches, that he wanted peace, that he and his people had no home, and could make none, as they were at all times apprehensive of the approach of cavalry. I told him that he should go to the White Mountains. He said that is not our country; neither are they our people. We are at peace with them, but never have mixed with them. Our fathers and their fathers before them have lived on in these mountains, and have raised corn in this valley. We are taught to make mescal our principal article of food, and in Summer and Winter here we have a never failing supply. At the White Mountains there is none, and without it now we get sick. Some of our people have been in at Goodwin. and for a short time at the White Mountains, but they are not contented, and they all say let us go to the Aravapa, and make a final peace, and never break it. I told him I had no authority to make any treaty with him, or to promise him that he could be allowed a permanent home here, but that he could bring in his band and I would feed them and report his wishes to the department commander. He went out and returned about the 1st of March with his whole band. In the meantime runners had been in from two other small bands asking the same privileges, and giving the same reasons. I made the same reply to all, and by about the 5th of March I had over three hundred here. I wrote a detailed account of the whole matter and sent it by express to Sacaton, to department head-quarters, asking for instructions, having only the general policy of the Government in such cases for my guidance. After waiting more than six weeks by letter was returned to me without comment, except calling my attention to the fact that it was not briefed properly. At first I put them in camp about one half mile from the post, and counted them, and issued them rations every second day. The number steadily increased until it reached the number of 510. Knowing, as I did, that the responsibility of the whole movement rested with me, and that in case of any loss to the Government coming of it I should be the sufferer, I kept them continually under observation, until I not only came to know the faces of all the men, but also the women and children. They were nearly naked, and needed everything in the way of clothing. I stopped the wagons from bringing hay, that I might buy from them. I arranged a system of tickets with which to pay them and to encourage them, and. to be sure they were properly treated. I personally attended to all the weighting. I also made inquiries as to the kinds of goods sold them, and prices. This proved a perfect success, not only the women and children engaged in the work, but many of the men. The amount furnished by them in about two months was nearly 300,000 pounds. During this time many small parties had been out with passes for a certain number of days to burn mescal. These parties were always mostly women, and I made myself sure by noting the size of the party, and from the amount of mescal brought in, that no treachery was intended. From the first I was determined to know not only all they did, but their hopes and intentions. For this purpose I spent hours each day with them in explaining to them the relations they should sustain to the Government, and their prospects for the future in case of either obedience or disobedience. I got from them, in return, much of their habits of thought and rules of action. I made it a point to tell them all they wished to know, and in the plainest and most positive manner. They were readily obedient and remarkably quick of comprehension. They were happy and contented. and took every opportunity to show it. They had sent out runners to two other bands which were connected with them by intermarriages, and had received promises from them that they would come in and join them.

I am confident, from all that I have been able to learn, that but for this unlooked for butchery by this time we would have had one thousand persons, and at least 250 able-bodied men. As their number increased and the weather grew warmer, they asked and obtained permission to move further up the Aravapa to higher ground and plenty of water, and opposite the ground they were proposing to plant, and were rationed every third day. Capt. STANWOOD arrived about the 1st of April and took command of the post; he had received while on the way verbal instructions from Gen. STONEMAN to recognize and feed any Indians he might find at the post as prisoners of war. After he had carefully inspected all things pertaining to their conduct and treatment, he concluded to make no changes, but had become so well satisfied of the integrity of their intentions, that he left on the 24th with his whole troop for a long scout in the lower part of the territory. The ranchmen in this vicinity were friendly and kind to them, and felt perfectly secure, and had agreed with me to employ them at a fair rate of pay to harvest their barley. The Indians seem to have lost their characteristic anxiety to purchase ammunition, and had in many instances sold their best bows and arrows. I made frequent visits to their camp, and if any were absent from count made it my business to know why. Such was the condition of things up to the morning of the 30th of April. They had so won on me that from my first idea of treating them justly and honestly as an officer of the army, I had come to feel a strong personal interest in helping to show them the way to a higher civilization; I had come to feel respect for men who, ignorant and naked, were still ashamed to lie or steal, and for women who would work cheerfully, like slaves, to clothe themselves and children but untaught, held their virtue above price. Aware of the lies and hints industriously circulated by the puerile Press of this Territory, I was content to know I had positive proof that they were so. I had ceased to have any fears of their leaving here, and only dreaded for them that they might at any time be ordered to do so. They frequently expressed anxiety to hear from the General, that they might have confidence to build for themselves better houses, but would always say: "You know what we want, and if you can't see him, you can write and do for us what you can." It is possible that during this time individuals from here had visited other bands; but that any number had ever been out to assist in any marauding expedition, I know is false.

[New York Times, July 21, 1871, p.1]