No person receiving or delivering goods, wares or merchandise shall place or keep upon, or suffer to be placed or kept upon any sidewalk in the city any goods, wares or merchandise which he shall be receiving or delivering. Provided, however, if any such person shall desire to receive or deliver any such goods, wares or merchandise in any building where by reason  of want of  an alley adjacent  to the  real estate upon which  the building is situated there  is  no convenient access thereto other than by passing over such sidewalk, then such person may receive or deliver such goods over and across such sidewalk, but shall at all times leave a passageway of not less than six feet in width for pedestrians, and shall not suffer the same to be or remain upon such sidewalk for longer than two hours.
('74 Code, § 25-20)  Penalty, see § 99.999