What is so strange about the Time Traveller's appearance at the next dinner party?

Which chapter are you referring to? He has weekly dinner parties. 

well im guessing the second one that he has at the begining.

The Time Traveller looked very confused. His coat was all dusty and dirty and there was some odd green substance on his sleeves. His hair was a big mess looking grey from the dust. His face was pale and their was a cut on his chin.

Thank You!!