The Zong massacre of 1781 prompted Peckard to speak strongly against slave trade in his sermons , some of which were published as tracts and pamphlets .
In 1781 , Peter Peckard , one of the earliest abolitionists , became master of Magdalene .
The Zong massacre of 1781 prompted one to speak strongly against slave trade in Peter Peckard 's sermons , some of which were published as tracts and pamphlets .
In 1781 , Peter Peckard , one of the earliest abolitionists , became master of Magdalene .