That the amount of time taken from the hours of sleep by underground service was no small item may be seen from the following record covering the last half of August, 1843. The record or memorandum is that of Mr. David Putnam, Jr., of Point Harmar, Ohio, and is given with all the abbreviations:
| Aug. | 13/43 | Sunday Morn. | 2 | o'clock | arrived |
| Sunday Eve. | 81⁄2 | " | departed for B. | ||
| 16 | Wednesday Morn. | 2 | " | arrived | |
| 20 | Sunday eve. | 10 | " | departed for N. | |
| Wife & children | 21 | Monday morn. | 2 | " | arrived from B. |
| Monday eve. | 10 | " | left for Mr. H. | ||
| 22 | Tuesday eve. | 11 | " | left for W. | |
| A. L. & S. J. | 28 | Monday morn. | 1 | " | arrived left 2 o'clock.[128] |
This is plainly a schedule of arriving and departing "trains" on the Underground Road. It is noticeable that the schedule contains no description, numerical or otherwise, of the parties coming and going; nor does it indicate, except by initial, to what places or persons the parties were despatched; further, it does not indicate whether Mr. Putnam accompanied them or not. It does, however, give us a clue to the amount of night service that was done at a station of average activity on the Ohio River as early as the year 1843. The demands upon operators increased, we know, from this time on till 1860. The memorandum also shows the variation in the length of time during which different companies of fugitives were detained at a station; thus, the first fugitive, or company of fugitives, as the case may have been, departed on the evening of the day of arrival; the second party was kept in concealment from Wednesday morning until the Sunday night next following before it was sent on its way; the third party seems to have been divided, one section being forwarded the night of the day of arrival, the other the next night following; in the case of the last company there seems to have existed some especial reason for haste, and we find it hurried away at two o'clock in the morning, after only an hour's intermission for rest and refreshment. The memorandum of night service at the Putnam station may be regarded as fairly representative of the night service at many other posts or stations throughout Ohio and the adjoining states.
Much of the communication relating to fugitive slaves was had in guarded language. Special signals, whispered conversations, passwords, messages couched in figurative phrases, were the common modes of conveying information about underground passengers, or about parties in pursuit of fugitives. These modes of communication constituted what abolitionists knew as the "grape-vine telegraph."[129] The signals employed were of various kinds, and were local in usage. Fugitives crossing the Ohio River in the vicinity of Parkersburg, in western Virginia, were sometimes announced at stations near the river by their guides by a shrill tremolo-call like that of the owl. Colonel John Stone and Mr. David Putnam, Jr., of Marietta, Ohio, made frequent use of this signal.[130] Different neighborhoods had their peculiar combinations of knocks or raps to be made upon the door or window of a station when fugitives were awaiting admission. In Harrison County, Ohio, around Cadiz, one of the recognized signals was three distinct but subdued knocks. To the inquiry, "Who's there?" the reply was, "A friend with friends."[131] Passwords were used on some sections of the Road. The agents at York in southeastern Pennsylvania made use of them, and William Yokum, a constable of the town, who was kindly disposed towards runaways, was able to be most helpful in times of emergency by his knowledge of the watchwords, one of which was "William Penn."[132] Messages couched in figurative language were often sent. The following note, written by Mr. John Stone, of Belpre, Ohio, in August, 1843, is a good example:—
Belpre Friday Morning
David Putnam
Business is aranged for Saturday night be on the lookout and if practicable let a cariage come & meet the carawan
J S[133]
Mr. I. Newton Peirce forwarded a number of fugitives from Alliance, Ohio, to Cleveland, over the Cleveland and Western Railroad. He sent with each company a note to a Cleveland merchant, Mr. Joseph Garretson, saying: "Please forward immediately the U. G. baggage this day sent to you. Yours truly, I. N. P."[134] Mr. G. W. Weston, of Low Moor, Iowa, was the author of similar communications addressed to a friend, Mr. C. B. Campbell, of Clinton.
Low Moor, May 6, 1859.
Mr. C. B. C.,
Dear Sir:—By to-morrow evening's mail, you will receive two volumes of the "Irrepressible Conflict" bound in black. After perusal, please forward, and oblige,
Yours truly,
G. W. W.[135]
The Hon. Thomas Mitchell, founder of Mitchellville, near Des Moines, Iowa, forwarded fugitives to Mr. J. B. Grinnell, after whom the town of Grinnell was named. The latter gives the following note as a sample of the messages that passed between them:—