We show the results of performing a slice extraction along the filamentary extinction feature of filament 9, which corresponds to the black line in the plane of the sky map below. Using Glue, we link spectral p-p-v cubes from the ThrUMMS survey with GLIMPSE-Spitzer mid-infrared images and extract velocities along a path tracing the entire extinction feature. We confirm that filament 9 is contiguous in velocity space as traced by lower density CO gas from the ThrUMMS survey.