Rubuta ci gaba ga wannan sakin layi - Sinclair yana daya daga cikin wadanda aka kama bayan yakin Homildon Hill
a cikin 1402, amma an sake shi akan fansa. Ya gaji mahaifinsa, a zahiri, a matsayin Jarl ta 1404; babu wani rikodin da aka taɓa sanya shi a matsayin Jarl, kuma babu wani tabbataccen rikodin da ya taɓa ziyartar jarl.