April 25th.—The following letter was this morning received from the Treasury:—

“‘Treasury Chambers, 24th April, 1854.

“‘My Lord,—I am commanded by my Lords Commissioners of Her Majesty’s Treasury to transmit for your information and guidance a copy of their Lordships’ minute of the 21st instant, appointing Lieut.-Colonel Maberly to a seat at the Board of Audit, and consolidating the appointments of Secretary to the General Post Office and Secretary to the Postmaster-General in the person of Mr. Rowland Hill.

“‘I am, &c.,
“‘C. E. Trevelyan.

“‘The Right Honourable the Postmaster-General,
“‘&c., &c., &c.’”

“Addressed the following letter to the Postmaster-General:—

“‘G. P. O., 25th April, 1854.

“‘My dear Lord,—Allow me to tender my sincere and earnest thanks for the change which has been effected in my position—a change for which I feel the more indebted because of the persevering kindness with which, in the midst of your own laborious duties, you have wrought for it from the moment of my earliest application to you on the subject, and with which I feel the more deeply gratified because it affords a promise of seeing those improvements which have been the main object of my life brought to completion under your lordship’s enlightened administration.

“‘I have the honour to remain,
“‘Your Lordship’s obliged and faithful servant,
“‘Rowland Hill.