there is a burial in Malew on 4 Mar 1808 of an unnamed child Speed - would fit your 1807 Henry

also first baptism I can see on island is Montagie alexander bapt Douglas St Georges 17970611
6 more follow at regular intervals until Charles in 1809

when was the parliamentary problem as unlikely he ran to island prior to this

also the debtors charter was rescinded 1814 tho it didn't affect existing on-Island debtors many misinterpreted it and emigrated from Island