The compleat comptinghouse, or, The young lad taken from the writing school and fully instructed by way of dialogue in all the mysteries of a merchant from his first understanding of plain arithmetick, to the highest pitch of trade [microform] : whereby the master is saved much labour and lad is led by the hand to all his work and business : which to youth is accouted troublesome but will here seem pleasant : a work very necessary for all that are concerned in keeping accompts of what quality soever / by John Vernon.