In addition to the force specified by your excellency, I understand that six companies of the Ohio militia are intended for Detroit. Our interests with the Indians will materially suffer in consequence of these extensive preparations being allowed to proceed with impunity. I have always considered that the reduction of Detroit would be a signal for a cordial co-operation on the part of the Indians; and if we be not in sufficient force to effect this object, no reliance ought to be placed in them. About forty regulars were last week added to the garrison of Niagara, and by all accounts barracks are to be immediately constructed at Black Rock, almost opposite Fort Erie, for a large force. I returned three days ago from an excursion to Fort Erie--the Grand River, where the Indians of the Six Nations are settled--and back by the head of the lake. Every gentleman, with whom I had an opportunity of conversing, assured me that an exceedingly good disposition prevailed among the people. The flank companies, in the districts in which they have been established, were instantly completed with volunteers, and indeed an almost unanimous disposition to serve is daily manifested. I shall proceed to extend this system now I have ascertained that the people are so well disposed--but my means are very limited. I propose detaching 100 rank and file of the 41st regiment to Amherstburg, almost immediately. _Colonel Baynes to Major-General Brock_. QUEBEC, May 21, 1812.