Allan Pinkerton, The spy in the rebellion; being a true history of the spy system of the United States Army during the late rebellion, revealing many secrets of the war hitherto not made public, compiled from official reports prepared for President Lincoln , General McClellan and the Provost-Marshal-General .

[302] refinement, and much esteemed by all who knew her, but this did not render it less advisable, under the circumstances, to have all her movements watched, and her house constantly shadowed by detectives. Her pleasant residence at No. 288 “I” street, was therefore placed under strict surveillance, and its inmates followed whenever they went out for a walk or drive, while all visitors at the house were invariably shadowed when they went away.

There was an old negro servant, known as Uncle Gallus, who went to and from the house oftener than any one else, on errands for the family. Finally one of my operatives drew the old fellow into conversation, and found him so cheerful and communicative, and so firm in his loyalty to the Northern cause, that when the fact was reported to me, I concluded to talk with Uncle Gallus myself. Accordingly, I gave orders to have him brought to my office, if it could be done without opposition on his part. The friendship I bore for the colored race, and my long experience as an underground railroad conductor, had given me such an insight into the character of the negro, that I believed I could gain his confidence and good — will if I should meet him.

Uncle Gallus came to my office quite willingly. He was a powerfully-built darky, though evidently well advanced in years, as attested by the bleached appearance of his wool and eye-brows. His skin was as black and shone as bright as polished ebony, and