information gap

I would like to speculate about information gaps.

Certainly, almost all information is presented in the text. Especially about clothes the characters are wearing. I love descriptions about Cecilia's readiness to evening's dinner, descriptions of her appearance.

<<On two occasions within half an hour, Cecilia stepped out of her bedroom, caught sight of herself
in the gilt-frame mirror at the top of the stairs and, immediately dissatisfied, returned to her
wardrobe to reconsider. Her first resort was a black crêpe de chine dress which, according to the
dressing table mirror, bestowed by means of clever cutting a certain severity of form. Its air of
invulnerability was heightened by the darkness of her eyes. Rather than offset the effect with a
string of pearls, she reached in a moment’s inspiration for a necklace of pure jet. The lipstick’s
bow had been perfect at first application. 
But the public gaze of the stairway mirror as she hurried toward it revealed a woman on her way to
a funeral, an austere, joyless woman moreover, whose black carapace had affinities with some
form of matchbox-dwelling insect. She did not linger—she turned on her heel, which was also black, and returned to her room.
...

She ran a hand along the few feet of personal history, her brief chronicle of taste. Her latest and
best piece, bought to celebrate the end of finals, before she knew about her miserable third, was the
figure-hugging dark green bias-cut backless evening gown with a halter neck. Too dressy to have
its first outing at home. She ran her hand further back and brought out a moiré silk dress with a
pleated bodice and scalloped hem—a safe choice since the pink was muted and musty enough for
evening wear. The triple mirror thought so too. She changed her shoes, swapped her jet for the
pearls, retouched her makeup, rearranged her hair, applied a little perfume to the base of her throat,
more of which was now exposed, and was back out in the corridor in less than fifteen minutes.

...

More in resignation than irritation or panic, she returned to her room.

She owned only one outfit that she genuinely liked, and that was the one she should wear. She let the pink dress fall on top of the black and, stepping contemptuously through the pile, reached for the gown, her green backless post-finals gown. As she pulled it on she approved of the firm caress of the bias cut through the silk of her petticoat, and she felt sleekly impregnable, slippery and secure; it was a mermaid who rose to meet her in her own full-length mirror. She left the pearls in place, changed
back into the black high-heeled shoes, once more retouched her hair and makeup, forwent another
dab of scent and then, as she opened the door, gave out a shriek of terror.>>

But it was only my favorite moment of Cecilia's behaviour, she was so excited before meeting Robbie.

So, continue... Also a lot of descriptions about the house, where family of Tallins were living. 

<<...but still she hesitated by the door, momentarily held by the perfection of
the scene—by the three faded Chesterfields grouped around the almost new Gothic fireplace in
which stood a display of wintry sedge, by the unplayed, untuned harpsichord and the unused
rosewood music stands, by the heavy velvet curtains, loosely restrained by an orange and blue
tasseled rope, framing a partial view of cloudless sky and the yellow and gray mottled terrace
where chamomile and feverfew grew between the paving cracks.>>

But there is not any information about the house from outside. I guess that it may be a big mansion with a big territory around it. I suggest that it can also be an ancient mansion which handed down from generation to generation. 

And the main gap that interested me is HOW OLD THE MAIN CHARACTERS? There isn't any mention about that. Of course, Briony is thirteen-year-old girl, but what about Robbie and Cecilia? I may say that they are about twenty-year-old, but I cannot be sure. 

So, may be that's all what I can say about information gaps in my book.

And again see you soon!