I thought I would add to the saga by noting a few quotes I found in Zion's Watch Tower.
The first one is in the June 1, 1910 issue, R. 4732: page 177:
"Brother Russell's Foreign Tour
"Thus it happened that our company leaving New York numbered twenty one, seventeen in addition to our party, which consisted of Brother Driscoll, representative of the Press Association; Brother L.W. Jones, who served as stenographer on the Atlantic, and Brother Rutherford, who served as stenographer on the Mediterranean, and who will visit the friends in Denmark, Sweden and Norway while we are in Great Britain and who will follow us in Great Britain, reaching home about a month or so later than we...."
Further on the article continues "...We had the pleasure also of Sister Rutherford's company as far as Paris."
I'm not sure if the stenographer above is Rutherford, Jr. or Judge Rutherford. What do you think?
At any rate, the second article in the April 15, 1911 issue, R. 4800: page 117: is definitely Rutherford, Jr.
"The Good Tidings Abroad
"We had a pleasant vogage--uneventful. The first two days the water was a little rough, and we had little difficulty in practising Lenten self denial. Brother Rutherford, Jr., served as our stenographer, and under the Lord's blessing, we were able to get out considerable work--answers and correspondence and matter for THE WATCH TOWER and newspapers.
"We landed at Plymouth (my stenographer and myself). Brother Driscoll, as representative of the Press Association, continued his journey, going direct to Vienna and beyond in preparation for our later coming."
Zion's Watch Tower, Aug. 1, 1911, R 4861:Page 230:
"Denver to Portland AND Homeward Conventions
"The following day was spent in the mountains of Colorado and Utah, journeying to Salt Lake City over the Denver and Rio Grande Railway...It was a day of rest from oral preaching, affording us an opportunity to preparing sermons for future use. Our faithful stenographer, Brother Rutherford, Jr., materially assisted in the work."
There may be more information on Malcolm in ZWT. If I find anything more, I will include it.