four o'clock
Syama , if he went , would be no protection ; but she would return early . To be certain , she made a calculation . It would take about half an hour to get to the wall ; the sun would set soon after seven ; by starting home at six she could have fully an hour and a half for the airing , which meant a possible hour and a half with Sergius . At four o'clock the sedan was set down before the merchant 's house , and , for a reason presently apparent , the reader to whom vehicles of the kind are unfamiliar is advised to acquaint himself somewhat thoroughly with them . In idea , as heretofore observed , this one was a box constructed with a seat for a single passenger ; a door in front allowed exit and entrance ; besides the window in the door , there was a smaller opening on each side . For portage , it was affixed centrally and in an upright position to two long poles ; these , a porter in front and another behind grasped at the ends , easing the burden by straps passed over the shoulders . The box was high enough for the passenger to stand in it .