X0206 3 2018-06-22 1 0001707502 Solid Biosciences Inc. SLDB 0001676653 Freed Martin I C/O SOLID BIOSCIENCES INC. 141 PORTLAND STREET, FIFTH FLOOR CAMBRIDGE MA 02139 1 0 0 0 Exhibit Index: 24.1 Power of Attorney /s/ Martin I. Freed 2018-06-27