Margot Morrell, author of “Shackleton’s Way – Leadership Lessons from the Great Antarctic Explorer,”  will speak Thursday in the Marion Music Hall on Front Street   at 7 p.m.,  an event sponsored by the Sippican Historical Society.  Morrell will talk about explorer Ernest Shackleton’s  1914-1916  expedition and the leadership attributes that helped him and his crew survive being stranded on an ice floe. Morrell, who last year wrote “Reagan’s Journey: Lessons from a Remarkable Career,”  has been profiled in newspapers, magazines, and TV and radio news programs around the world. Her talk is free and open to the public. For information, call 508-748-1116,  or e-mail info@sippicanhistoricalsociety.org.