But the time had come to turn his left flank and to attack his forces in the rear, for the postman now took the field,--that is to say, Harrington, good fellow, finished his third delivery, four good miles and nine- tenths of a furlong, snow two inches deep, three, four, six, before he was done, and then returned to his branch office to report. "Two-legged parcel; insufficient address; 99 Linwood Street! Jim, what ever come to that letter that went to 99 Linwood Street with insufficient address six weeks ago?" "Linwood Street? Insufficient address? Foreign letter? Why, of course, you know, went back to the central office." "I guess it did," said Harrington, grimly; "so I must go there too." This meant that after Harrington had gone his rounds again on delivery route No. 6, four more miles and nine- tenths more of a furlong, 313 doorbells and only 73 slit boxes, snow now ranging from 6 inches to 12 on the sidewalks, and breast-deep where there was a chance for drifting, when all this was well done, so that Harrington had no more duties to Uncle Sam, he could take Nora McLaughlin's work in hand, and thus defeat the prince of evil. To the central office by a horse-car. Blocked once or twice, but well at the office at 7.30 in the evening. Christmas work heavy, so the whole home staff is on duty. That is well. Enemy of souls loses one point there. Blind-letter clerks all here. Insufficient-delivery men both here. Chief of returned bureau here. All summoned to the foreign office as Harrington tells his story. Indexes produced, ledgers, journals, day-books, and private passbooks. John McLaughlin's biography followed out on 67 of the different avatars in which his personality has been manifested under that name. False trail here--clue breaks there--scent fails here, but at last--a joyful cry from Will Search:-- "Here you are! Insufficient address. November 1. Queenstown letter--`Linwood, to John McLaughlin. Try Dorchester. Try Roxbury. Try East Boston. Try Somerville'-- and there it stops, and was not returned." "Try Somerville!" In these words great light fell over the eager circle. Not because Somerville is the seat of an insane hospital. No! But because it is not in the Boston Directory. If you please, Somerville is an independent city, and so, unless John McLaughlin worked in Boston, if he lived in Somerville, he would not be in the Boston Directory. Not much! Somerville has its own seven John McLaughlins besides those Boston ones. "I say, Harry, Tom, Dick--somebody fetch Somerville Directory!" Dick flew and returned with the book. "Here you be! `John McLaughlin, laborer, 99 Linwood Street! "Victory!" Satan's forces tremble, and as the different officers return to their desks "even the ranks of Tuscany" in that well-bred office "can scarce forbear to cheer."