And I never finished the write up for The Empire of Glass.

The Empire of Glass is the only story with substantial scenes between Braxiatel and the Doctor. Both the Doctor and Braxiatel are much, much younger in this story. The suggestion that they are siblings is reinforced. The running game in the novel seems to be dodging mentioning the relationship between the Doctor and Braxiatel.

Dodge 1.

"You know of the Doctor?" he said to Vicki eventually.

"I travel with him," she said. "And you know him?"

"We are... acquainted," Braxiatel said, frowning slightly.

Dodge 2.

"You're very much like the Doctor, you know?" she said.

"I should hope so," Braxiatel said, affronted, "after all, we are -"

Dodge 3.

"Braxiatel, you say?" He half-turned towards the window. "Braxiatel, here?"

"You know this man?" Marlowe said, stepping forward.

"Yes, yes," the Doctor fussed, waving his hand at the man. "Yes, Braxiatel is my... Well, well, well. Things are suddenly becoming a little clearer."



This bit says the Doctor left first, but as Tears of the Oracle was written by Brax's creator and Empire of Glass wasn't, I prioritize Oracle over Empire. Clearly Brax was just humouring the little bro.

"Doctor," he said as the party halted in front of him, "I'm sorry that this little reunion has to take place in such a manner, but needs must when the devil drives."

"Braxiatel, my dear chap!" The Doctor strode forward and shook the man's hand. "Good to see that you followed my example and left them too."

"Oh, they allowed me to leave," Braxiatel replied, "and I've spent most of my time since trying my best not to follow your example."

"So," the Doctor said, "tell me about these aliens flying around Venice, and the spaceships you have on the moon."

Braxiatel sighed. "Please, Doctor, not in front of the locals."

The tension between sibling love and sibling hatred is also clearly outlined here.

You could always count on the Doctor to arrive in the right place, give or take a few miles, at the right time, give or take a few days. His approximateness was one of his few endearing qualities.

And: “You always were over-confident, Braxiatel, even as a child.”

And: "Yes," he said simply. "I've been arrogant and foolish."

"And not for the first time, hmm?" said the Doctor superciliously.

Vicki also takes note of the similarity between them:

Braxiatel was gazing along the corridor, down which Shakespeare and the Jamarians had vanished, with the faintly disturbed expression of a man who had just found a fish in his coffee percolator: The Doctor was smiling superciliously and staring up into the dizzying arches of the hall, and it struck her for the first time how similar the two men looked. Both of them had aristocratic features, and both of them found it easier to look superior than sympathetic.

And more sibling ribbing!

"Well," the Doctor said before she could erupt, "here's a pretty kettle of worms to come to pass, hmm?"

"Shut up." There was no emotion at all in Braxiatels voice. "Just -just shut up."

"Don't worry, my boy." Vicki could tell from the expression on the Doctor's face that he was enjoying himself immensely. "I've made mistakes of my own, you know. Not of this magnitude, I have to confess, but mistakes none the less."