Donna,

The cousin's name that looked like Mosche MABLIS on the manifest is MABLIN.  On another page of the manifest (the detained alien page) it noted that the cousin's address was 128 Division.  A search of city directories found Morris MABLIN at that address in 1906.

NAME:	Morris Mablin
RESIDENCE YEAR:	1906
STREET ADDRESS:	128 Division
RESIDENCE PLACE:	New York, New York, USA
PUBLICATION TITLE:	New York, New York, City Directory, 1906

Hope this helps,

Sherri Bobish