On 12 July he wrote again , making explicit the offer to surrender West Point , although his price ( in addition to indemnification for his losses ) rose to Â # 20,000 , with a Â # 1,000 downpayment to be delivered with the response . On July 12 he wrote again , making explicit the offer to surrender West Point , although his price ( in addition to indemnification for his losses ) rose to Â # 20,000 , with a Â # 1,000 downpayment to be delivered with the response .