Sentence:  I have said I was still in darkness, yet it was not the blackness of the last night; and looking up into the inside of the tomb above, I could see the faintest line of light at one corner, which showed the sun was <WSD>up</WSD>. 
Meaning of the word marked with <WSD> tags:  Above the horizon, in the sky (i.e. during daytime or night-time)