15 having come into Egypt and continued there, I found opportunityf for no small instruction. I, therefore, deemed it most necessary myself to devote some zeal and ‘love-labour’ to (the task of) interpreting this book; devoting, indeed, much sleepless care and skill in the interval in order, having broughtg the book to an end, to publish it for them also who in the land of their sojourning desire to be lovers of learning,