However , Dom Duarte 's line was banished by law rather than by judicial sentence .
The 1834 constitution in force at the time of D. Miguel I 's banishment did not protect the citizenship of those exiled by law .
However , Dom Duarte 's line was banished by law rather than by judicial sentence , and the 1834 constitution in force at the time of D. Miguel I 's banishment did not protect the citizenship of those exiled by law .