Lower quadrats: 
N side: only white discoloratinn left, 
E side: crusts mostly gone except right side, 
S side: already ¢lean 
W side: All clean as before; reddish color visible, « 
Mid quadrats; 
N side: Phyllopsora all gone; alga 50% gone 
E side; 10 % alga left on either side of figure; red balorstien eonter. 
S side: 100% clean. Steet | 
W side: Phyllopsora already gone; some alga left, rt, center, 
Upper quadrats; 
N side: All clean except remnant white patch upper left, 
E, side: 30% alga left 
S side; More or less all clean KL 
W side: remnants of alga withhitish crust upper right; top clean 
