Washington, January 23, 1848.

My dearest Margaret,—At the strong desire of the colonel, I must remain here a few days longer. He wishes me to go with him over all the reports in order to get at all the facts in relation to the services of the engineer officers in the recent campaign of Mexico. I am able to afford many explanations of the reports, presenting in a stronger light the services of our officers, which will enable the colonel to present a strong case to the Secretary in matters of brevets.

The colonel and his family have been very cordial to me, and nothing could be more grateful than the high appreciation they have for the services of our officers. The colonel takes great pride in the distinction which our corps has acquired. Indeed, the services of the engineers have been so conspicuous that the corps has become popular. Every one knows that the engineers have important functions in the field.

I have paid my respects to the President and Secretary, and was highly gratified with my interview. The Secretary had a half hour’s leisure, and I took the opportunity to express my sense of the great ability, wisdom, and patriotism of General Scott. The Secretary has the highest admiration for his military achievements, and is indeed a just and judicious friend to the service.

I am boarding at Mrs. Janney’s with my old friends, Gilmer and Woodbury. Woodbury married Miss Childs, a very pleasant lady. Her mother is also boarding at the same place, a highly intelligent person, and the wife of Colonel Childs, distinguished for his defense of Puebla.

You may be sure I am very impatient to see you and my little ones. Nothing but a sense of duty to my brother officers, who are absent in the field, could have induced me to remain. I hope to reach Newport within the week, certainly by next Sunday morning.

Affectionate remembrances to friends, and love, much love, to my Hazard and Susan.

Yours most affectionately,
Isaac.

My health is splendid, my wound improving.

The enforced visit to Washington was not without pleasant features. He was received with the gratifying attentions due an officer just from the seat of war, who had distinguished himself for gallantry and conduct, and enjoyed the congenial duty of explaining the military operations to his chief, and aiding in securing for his absent comrades the honors and rewards they had so well earned. A letter of February 6 from his friend, Captain Foster, is of interest in this connection:—