Dracula 7

"There was in the room the same thin white mist that I had before noticed... I felt the same vague terror which had come to me before and the same sense of some presence. I turned to wake Jonathan, but found that he slept so soundly that it seemed as if it was he who had taken the sleeping draught, and not I. I tried, but I could not wake him. This caused me a great fear, and I looked around terrified. Then indeed, my heart sank within me: beside the bed, as if he had stepped out of the mist—or rather as if the mist had turned into his figure, for it had entirely disappeared—stood a tall, thin man, all in black. I knew him at once from the description of the others. The waxen face; the high aquiline nose, on which the light fell in a thin white line; the parted red lips, with the sharp white teeth showing between; and the red eyes that I had seemed to see in the sunset on the windows of St. Mary's Church at Whitby. I knew, too, the red scar on his forehead where Jonathan had struck him. For an instant my heart stood still, and I would have screamed out, only that I was paralysed."
Chapter XXI, Page 305

This passage depicts when and how Dracula first appears to Mina when she is awake. It contains several examples of symbolism, most prevalent being the physical appearance of the Count. The clothing he wears is black, symbolizing his intentions as well as his relation to the darkness and by extension. The scar on his forehead seems to symbolize that, however, he can be damaged. The way he appears from the mist is reminiscent of the sexual connotations of his feeding by the way he enters the room as the mist, sneakily, seductively. Also, the fear that Mina feels and the darkness of his appearance is a Gothic trait.

Dracula 6

"We were prepared for some unpleasantness, for as we were opening the door a faint, malodorous air seemed to exhale through the gaps, but none of us ever expected such an odour as we encountered... here the place was small and close, and the long disuse had made the air stagnant and foul. There was an earthy smell, as of some dry miasma, which came through the fouler air. But as to the odour itself, how shall I describe it? It was not alone that it was composed of all the ills of mortality and with the pungent, acrid smell of blood, but it seemed as though corruption had become itself corrupt. Faugh! it sickens me to think of it. Every breath exhaled by that monster seemed to have clung to the place and intensified its loathsomeness."
Chapter XIX, Page 268

Here the door to Dracula's lair is opened for the first time. The narrator, Jonathan Harker states that even before the door opens, the reek is coming out of the sides of the door, which brings to mind a dank, humid atmosphere the almost gives the air a more solid texture, as if it could be parted with a hand. When the door is actually opened, the rankness pours out, almost like a liquid. The thing described, the smell, actually lends more to the mood than anything else could. It is already clear that the men are in a dark house, but the description of the horrible smell lends an almost slimy tangibility to the mood. Even the smell of the earth is described as a dry miasma, which means a noxious fume, so all in the air is really evil and they are truly entering the stronghold of the devil. The author makes his usual great use of simile and metaphor to describe the Gothic mood of the scene, and the bloodiness of the setting.