Army engineer who designed and built the ironclad Monitor for the US government. ALS signed 'J. Ericsson,' one page, 8.5 x 10.75, no date. Letter to a gentleman in his rather difficult to decipher writing stating 'Mr. Sargus has ordered me to attend at their office by 1 o'clock in a matter of vital importance - it will therefore be impossible for me to meet you.' Some light toning and wrinkling and a pencil notation to lower portion of page, otherwise fine condition. RRAuction COA.