Some features of the 21-cm velocity measurements of hydrogen gas for b > 20 are analyxed. An argu- ment is presented for consideration of an expression for the residual velocity-distance relation of the form R.V. (km/sec) = 1.24 cool' cosb't2.62 sin" coob'- 1.60 sinb' -Sr( 1 - [1.1 tsin2 (1't53 )J cos2b't0.25 sin `-48 ) sin2b'}, where is the distance and S is an unknown (positive) scale factor. Crude arguments suggest km sec ' kpc '. Some implications of these numerical values and of the assumption that the local gas system is associated with the stellar Gould's belt system are briefly discussed.