Sentence:  When I came to Renfield's room I found him lying on the floor on his left side in a glittering pool of blood. When I went to move him, it became at once <WSD>apparent</WSD> that he had received some terrible injuries. 
Meaning of the word marked with <WSD> tags:  Clear or manifest to the understanding; plain; evident; obvious; known; palpable; indubitable.