The bones of buffaloes had been more or less abundant since the company left Loup Fork. This probably indicated the eastern limit of the buffalo range. Among their bones there were frequently found skulls of human beings, probably Indians.
On Sunday the 9th the camp moved four miles and laid over for the day. Timber grew scarcer and the pioneers learned the value of the buffalo chip for making fires. At this season of the year, the cottonwood trees became green and were not fit for fires. "I wrote two letters for Brother Wolsen to take with him to Pueblo. One was to Brother Ferguson and the other to Brother Bevin. We had a meeting and a good one. The spirit of God ruled over the camp. Peace, quiet, and contentment pervaded almost every heart. The Twelve met and it was thought best for the brethren not to start for Pueblo until they arrived at Laramie. I rode with the Twelve and others four miles up the river and saw large herds of buffaloes come to water."
The tenth was cold, the thermometer standing at 33 degrees, with a moderate wind. Before leaving camp, a letter was put in a board by sawing an opening the width of the saw. It was nailed to a post which was planted firmly in the earth. The letter was for the next company which was expected along in six or eight weeks. On the board were the words: "Open this box and you will find a letter; 316 miles from Winter Quarters; Pioneers; Latitude 40 degrees." The letter contained an account of the journey.
The grass was so completely eaten off that the cattle were very poor and unfit for long journeys. The movement of the buffaloes was eastward and they ate everything before them. It did not require many days, however, at this season of the year for the grass to make a considerable growth. "We passed through some miles of dead grass which we burned to give new feed for the next company. It made a great fire indeed."
Here in the midst of the journey, more than 300 miles from the Missouri River, with scant material, and few mechanical appliances, the ingenious nature of man asserted itself to meet a daily desire to know just how far the pioneers were traveling each day. William Clayton writes under date of May 8, 1847:
"I have counted the revolutions of a wagon wheel in order to get the exact distance we have traveled. The reason why I have taken this method which is somewhat tedious, is because there is generally a difference of two, and sometimes four, miles in a day's travel between my estimation and that of some others, and they have all thought I underrated it. This morning I determined to take pains in order to know for a certainty how far we would travel today. Accordingly I measured the circumference of one of the hind wheels of Brother Kimball's wagon, being the one I sleep in, in charge of Philo Johnson. I found the wheel exactly fourteen feet eight inches in circumference, not varying one eighth of an inch. I then calculated how many revolutions it would require for one mile and found it precisely 360, not varying one fraction, which somewhat astonished me. I have counted all the revolutions during the day's travel and find it to be a little over 11 1/4 miles. According to my previous calculations we were 285 miles from Winter Quarters this morning before we started, and after traveling ten miles I placed a small cedar post in the ground with these words inscribed on it with a pencil. 'From Winter Quarters 295 miles, May 8, 1847. Camp all well. Wm. Clayton.' Some have estimated the day's journey at 13 and some 14 miles, which serves to convince more strongly that the distances are overrated. I have repeatedly suggested a plan of fixing machinery to a wagon wheel to tell the exact distance we travel, and many begin to be sanguine for carrying it into effect."
This tedious effort led to a mechanical contrivance which was later put into effect. Considering the circumstances of the pioneers, it was not a little extraordinary that such a rodometer should be constructed at such a time and under such circumstances. Here is a description of it: "Let a wagon wheel be of such a circumference, that 360 revolutions make one mile. (It happens that one of the requisite dimensions is now in camp.) Let this wheel act upon a screw in such a manner that six revolutions of the wagon wheel shall give the screw one revolution. Let the threads of this screw act upon a wheel of sixty cogs, which will evidently perform one revolution per mile. Let this wheel of sixty cogs, be the head of another screw, acting upon another wheel of thirty cogs; it is evident that in the movements of this second wheel, each cog will represent one mile. Now, if the cogs were numbered from 0 to 30, the number of miles traveled will be indicated during every part of the day. Let every sixth cog of the first wheel be numbered from 0 to 10, and this division will indicate the fractional parts of a mile, or tenths; while if any one should be desirous to ascertain still smaller divisional fractions, each cog between this division, will give five and one-third rods. This machinery (which may be called the double endless screw) will be simple in construction, and of very small bulk, requiring scarcely any sensible additional power, and the knowledge obtained respecting distances in traveling will certainly be very satisfactory to every traveler, especially in a country but little known. The weight of this machinery need not exceed three pounds."