side of the main Busia-Mumias road) and 1,436 feet at the source of the River Sango at Map Reference XR 2251 (Sheet NA-36-15); thence downstream following the thalweg of the River Sango to its confluence with the River Sio; thence following the thalweg of the River Sio to its mouth in Lake Victoria. From this point, the boundary continues following a straight line southwesterly to the most northerly point of Sumba Island; thence by the western and southwestern shores of that island to its most southerly point; thence following a straight line southeasterly to the most westerly point of Mageta Island; thence following a straight line, still southerly, to the most western point of Kiringiti Island; thence following a straight line southerly to the most westerly point of Ilemba Island; thence following a straight line southerly to the westernmost point of Pyramid Island; thence following a straight line due south to a point on latitude 01000'S. From this point the boundary continues following the 01000'S parallel to the western shore of Lake Victoria; thence following the boundary pillars already erected along the 01000'S as far as the second crossing of this line by the River Kagera, between boundary pillars Nos. 27 and 26; thence following the thalweg of the River Kagera, upstream, to its confluence with the River Kakitumba; thence following the thalweg of the River Kakitumba, upstream, to its confluence with the River Chizinga; hence following the River Chizinga, upstream, to the source of its southwestern branch marked by BP 38, and continuing along the thalweg in a southwesterly direction to BP 37 on the saddle between the hills Mavari and Kitoff; thence northwesterly in a straight line to a direction pillar on a knoll at the foot of the easterly spur of Kitoff; thence in a straight line along the easterly spur of Kitoff to a direction pillar; thence in a straight line to a direction pillar on the southeasterly spur of Kitoff; thence in a straight line to BP 36 on the prominent southerly spur of Kitoff; thence continuing around the slopes of the hill Kitoff marked by direction pillars to BP 35 and by direction pillars along the westerly spur of Kitoff and in a series of straight lines to BP 34; thence continuing to BPs 33 and 32 along the eastern slopes of the Mashuri range marked at each change of direction by a direction pillar as far as BP 31 on a conspicuous small hill; thence in a straight line in a southeasterly direction to another conspicuous small hill marked by a direction pillar; thence in a straight line across the River Muvumba to the southern summit of the hill Ndega (Mbega) marked by BP 30; thence in a straight line to a direction pillar in the valley between the hills Ndega and Kivisa; thence in a straight line to a direction pillar on the northern spur of the hill Kivisa; thence in along the spur of this hill to its