If I recall correctly, I have read elsewhere the 33 were 29 blacks and 4 mulatto, and the mulattos were allowed to keep their seats while the rest were removed.
Regardless, that is not a situation where whites were not allowed to vote, nor consistent with the other details of the narative you suggested. Its presence on wikipedia is certainly not consistent with it being such an embarrassing event that it was thouroughly scrubbed from history except for a remarkable textbook that somehow survived.
How much confidence do you have in the accuracy of the textbook you read... Or your memory of it?
Such a characterization would not be allowed to remain on Wikipedia. Wikipedia is a "woke" source that is constantly monitored and edited by Liberals who will not tell the truth about anything they consider important. If you don't believe me, just look at their entries on issues like Abortion. They are very biased, and unwilling to offend any protected classes.
How much confidence do you have in the accuracy of the textbook you read... Or your memory of it?
I have a lot of confidence that I have repeated the gist of what I read, but this memory is from a long time ago.
If I recall correctly, they called the black legislators "The wonder of the world" in the paragraph heading.
With concerted effort I might be able to figure out what the book was, and with further effort I might be able to get a copy of it, but it won't be easy, not after all these years anyway.