Mars on 1960 December 27/28 at 20:17 local time (01:17 UT) as sketched by Kenneth Chalk. C.M. 311°. 6" reflector at 125x. Seeing 6. Transparency 4-5. After completing the drawing, the telescope was tried at 200x using an amber haze filter from a camera. No further detail was recorded except possibly a slightly dusky area at the place x. T = 3°.

Mars on 1961 February 8/9 at 21:03-21:13 local time (2:03-2:13 UT) as sketched by Kenneth Chalk. C.M. 301°. 6" refractor at 220x. Seeing 4/10. Transparency 3/5. T = -1°.

Mars on 1960 November 23/24 at 21:25 local time (02:25 UT) as sketched by Kenneth Chalk. C.M. 270°. 6" refractor at 150x. Seeing 3. Transparency good. T = 8°.

Mars on 1961 January 4/5 at 21:05-21:20 local time (02:05-02:20 UT) as sketched by Kenneth Chalk. C.M. 255°. 6" refractor at 220x. Seeing 3-4/10. Transparency 5/5. T = 1°.

Mars on 1961 January 11/12 at 23:40-23:50 EST (04:40-04:50 UT) as sketched by Kenneth Chalk. C.M. 231°. 6" refractor at 150-220x. Seeing 6-5 (deteriorated)/10. Transparency 4/5. T = 0°.

Mars on 1960 December 3/4 at 22:49-23:05 local time (03:49-04:05 UT) as sketched by Kenneth Chalk. C.M. 1 202°. 6" refractor at 220x. Seeing 4. Transparency 4. Detail in northern hemisphere visible only at first. The dark region in the south remained prominent. T = 7°.

Mars on 1961 January 11/12 at 21:00-21:15 EST (02:00-02:15 UT) as sketched by Kenneth Chalk. C.M. 192°. 6" refractor at 150x. Seeing 2-3/10. Transparency 4/5. T = 0°.

Mars on 1961 January 18/19 at 20:55 local time (01:55 UT) as sketched by K. Chalk. C.M. 127°. 6 refractor at 220x. Seeing 2-3/10. Transparency 4/5. T = -1°.