These unofficial experiments did not take place till 26th July 1907.
You must look at it this way: what I know is unofficial; what he knows is official.
But he was very ready with his pen, and served as a kind of unofficial poet-laureate.
It is only necessary to refer briefly to the unofficial Boer attempts at peace.
Captain Erskine nodded, and did his best to conceal an unofficial smile.
Brains, purpose, will,—all are needed by these unofficial statesmen.
The periodical was unofficial and had a difficult struggle for existence.
In unofficial dress the verger swept out the dust of the week.
Why should he not return to India in an unofficial character?
Unofficial work in this line is already carried on to some extent.