about ten to fifteen
roughly , about seven thousand miles , as the crow flies . As to how long it will take us to get there ; we can do the distance in sixty hours , by going aloft into the calm belt , shutting ourselves in , and going full speed ahead . Otherwise -- '' `` Thanks , very much ; and never mind the ` otherwise , ' '' answered Sir Reginald . `` This is going to be a _ sea _ trip ; and we are going to do at least a part of it in leisurely fashion , say , about ten to fifteen knots an hour . When we are tired of that , and at night , we can go aloft and put on the speed if we wish . And , now that I come to think of it , is there any reason why we should not start at once ? '' No one , it appeared , had any reason to advance against the baronet 's proposal .